236 lines
11 KiB
Markdown
236 lines
11 KiB
Markdown
# Research Brief — Roman Commercial Venture
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### For: ChatGPT research sessions
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### Purpose: Extract historically grounded parameters for OTIVM and CIVICVS simulation
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### Date: 2026-04-28
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---
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## 0. Before you begin — read this
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This brief is for a simulation project, not a game with Roman aesthetics.
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Every parameter you produce will be encoded into a database and used to govern
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the behaviour of a historically grounded world model. Precision is not optional.
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Vagueness is actively harmful.
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**The standard for every claim you make:**
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- It must be traceable to a named, datable source — archaeological record,
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primary text, epigraphy, or peer-reviewed scholarship.
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- It must be scoped to a specific period, region, and social context.
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"Romans used mules" is not useful. "A laden mule on the Via Appia in the
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first century BCE could carry approximately X kg at Y km per day under
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conditions Z" is useful.
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- Where exact figures are unavailable, give a defensible range with the
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reasoning behind it. Do not invent precision. Do not smooth uncertainty
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into false confidence.
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**On Latin terminology:**
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Use the Latin term wherever it is academically defensible. Do not default to
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English equivalents that lose information. If a Latin term carries meaning
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that English cannot carry in a single word, use the Latin and explain it.
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The project uses CIVICVS rather than "civic duty" for exactly this reason —
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the Latin is denser, more precise, and scoped to its period in a way that
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the English is not. Apply this standard throughout your responses.
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Write Latin in CAPITALS where the term is being introduced as a canonical
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token. Once established, mixed case is acceptable in prose.
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---
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## 1. Context
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The simulation models a MERCATOR — a Roman merchant — operating in approximately
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14 BCE, in the western Mediterranean. The merchant begins in Ostia with 50
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denarii and a single CODEX ACCEPTI ET EXPENSI (account book). He conducts
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NEGOTIA (commercial ventures) along overland and maritime routes.
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The five locations in scope for the first research phase:
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| Token | Latin | Modern location | Character |
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| OSTIA | Ostia | Ostia Antica, Lazio | Port at the mouth of the TIBER. Primary import/export hub for Rome. |
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| CAPVA | Capua | Santa Maria Capua Vetere, Campania | Major inland market city. Via Appia junction. |
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| BRVNDISIVM | Brundisium | Brindisi, Puglia | Adriatic port. Eastern trade gateway. End of the Via Appia. |
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| CARTHAGO | Carthago | Tunis, Tunisia | North African trading centre. Grain, linen, dyes. |
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| ALEXANDRIA | Alexandria | Alexandria, Egypt | Eastern Mediterranean hub. Grain, luxury goods, knowledge. |
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---
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## 2. The NEGOTIVM — what we need to understand
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A NEGOTIVM (commercial venture) is not a single act. It is a chain of
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discrete ITINERA (legs), each with its own mode, personnel, time, cost,
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cargo constraint, and failure profile.
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For each of the four routes below, describe the complete chain of ITINERA
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from origin warehouse to destination market. For each ITER (leg):
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**2.1 Mode of transport**
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- What moved the cargo? IUMENTUM (pack animal — specify species and breed
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where known), PLAUSTRUM (cart — specify type), NAVIS (vessel — specify
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type: ACTUARIA, ONERARIA, CORBITA, etc.), human porterage (BAIULI).
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- What was the road or waterway? Named where possible (Via Appia, Via Ostiensis,
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Mare Tyrrhenum, etc.). Surface condition, seasonal constraints.
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**2.2 Cargo unit**
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- What was the standard unit of cargo for this good on this leg?
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AMPHORA (specify type: Dressel 1, Dressel 20, etc. — these are not
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interchangeable), MODIVS (dry measure), TALENTVM, LIBRA. Give weight
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and volume where known.
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- What was the maximum load per transport unit (mule, cart, vessel)?
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- What was the practical load — accounting for personnel provisions,
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equipment, and the tendency to under-load to reduce spoilage and
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breakage risk?
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**2.3 Personnel**
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- Who was required? The MERCATOR himself, a FACTOR (agent — resident at
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destination or travelling with the cargo?), BAIULI (porters), MULIONES
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(muleteer — one per how many animals?), NAVARCHUS (ship captain),
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NAUTAE (sailors — how many per vessel type?), CUSTODES (guards — under
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what conditions were they necessary?).
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- Who was slave (SERVUS), free hired (MERCENNARIUS), or contracted
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(specify the Roman contractual form where known: LOCATIO CONDUCTIO
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OPERARUM, LOCATIO CONDUCTIO OPERIS)?
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- What did each cost per day, per leg, or per NEGOTIVM?
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**2.4 Time**
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- Elapsed time from origin warehouse to destination market. Not sailing
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time — total time including: loading (ONERATIO), waiting for weather
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or convoy (MORA), transit, customs inspection (PORTORIUM), unloading
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(EXONERATIO), and market negotiation.
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- Seasonal variation. The MARE CLAVSVM (closed sea season, roughly
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November to March) is the hard constraint for maritime legs. What
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happened to overland legs in winter? In summer heat?
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**2.5 Cost**
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- PORTORIUM (customs duty) — rate and collection point. The Roman
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customs system was farmed to PUBLICANI. Rates varied by region and
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good. Give the rate where known, the range where uncertain.
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- VECTVRA (freight charge) — per unit of cargo, per leg.
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- Personnel costs — daily rates or per-NEGOTIVM fees.
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- Incidental costs — harbour fees, warehouse rental (HORREUM), road
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tolls, bribes where documented.
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- Total cost as a percentage of cargo value where scholarly estimates exist.
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**2.6 Failure modes**
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- What could go wrong on this leg, and how often did it?
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- NAUFRAGIVM (shipwreck) — frequency estimates from archaeological
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record (Mediterranean wreck distribution is well documented).
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- Theft (FVRTVM) — on road versus at sea versus in warehouse.
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- Spoilage — what goods were vulnerable on which legs? Olive oil in
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summer heat. Wine in transit shock. Grain in damp holds.
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- Price collapse at destination — how was the MERCATOR exposed to
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market conditions he could not observe at departure?
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- Personnel failure — illness, desertion, dishonesty of FACTOR.
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---
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## 3. The four routes — research in this order
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### Route I — OSTIA to CAPVA
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Primary good: olive oil (OLEUM), fish sauce (GARUM).
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Character: Short overland leg. Via Ostiensis to Rome, then Via Appia
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south to Capua. Well-maintained roads. High traffic, therefore lower
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bandit risk but higher competition and toll exposure.
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Research note: This route was so heavily trafficked that it is the best
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documented of the four. Prioritise precision here — it sets the baseline
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for all subsequent routes.
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### Route II — CAPVA to BRVNDISIVM
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Primary good: Campanian wine (VINVM CAMPANIVM), wool (LANA).
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Character: Via Appia, the entire length. The most famous road in the
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Roman world. Overland only. Significant elevation change through the
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Apennines. Seasonal variation is marked.
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Research note: Focus on the mule train (AGMEN IVMENTORVM). How was it
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organised? Who led it? What was the ratio of guards to cargo handlers?
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### Route III — BRVNDISIVM to CARTHAGO
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Primary good: Adriatic grain (FRVMENTVM), amber (SVCCINUM).
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Character: Maritime crossing of the Ionian Sea, then coastal navigation
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to North Africa. The amber is not local — it arrived in Brundisium from
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the north via intermediary traders. Document the amber's known provenance
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chain and where the MERCATOR entered it.
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Research note: The SVCCINUM provenance chain is of particular scholarly
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interest. Trace it as far back as the evidence allows. This is the first
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route that connects Roman commerce to pre-Roman and non-Roman worlds.
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### Route IV — CARTHAGO to ALEXANDRIA
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Primary good: North African linen (LINVM), frankincense (TVS).
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Character: Maritime, coastal, longest leg. North African coast eastward.
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TVS originated far outside the Roman world — document the known
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intermediary chain from Arabia to Carthage.
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Research note: This route connects Roman commerce to the Arabian and
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Indian Ocean trade networks. The MERCATOR at this point is the end
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consumer of a supply chain that begins thousands of kilometres and
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potentially thousands of years from Rome.
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---
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## 4. OTIUM — the other half of the merchant's time
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OTIUM is not idleness. It is the deliberate withdrawal from NEGOTIVM for
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the purpose of restoration, reflection, relationship-building, and civic
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participation. Cicero wrote extensively on this. It was a moral and social
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category, not merely the absence of work.
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Research the following:
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- What did a Roman merchant of modest means actually do during OTIUM?
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Not a senator's OTIUM — a working MERCATOR's OTIUM.
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- What social obligations (OFFICIA) competed with OTIUM? Client
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relationships (CLIENTELA), religious duties, guild membership
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(COLLEGIUM — was the MERCATOR likely a member of one? Which?).
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- What was the relationship between OTIUM and AVCTORITAS? How did
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visible leisure — the right kind, in the right company — build
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reputation and therefore future commercial opportunity?
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- What did OTIUM cost? Not in money, but in opportunity. What
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NEGOTIVM could not be conducted while the MERCATOR rested?
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---
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## 5. Output format requested
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For each route and each ITER, produce a structured parameter table:
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| Parameter | Value | Unit | Confidence | Source |
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| Transit time | X | days | high/medium/low/estimated | Author, Title, date or excavation reference |
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| Cargo capacity per mule | X | kg | ... | ... |
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| VECTVRA rate | X | denarii per amphora | ... | ... |
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| PORTORIUM rate | X | % of cargo value | ... | ... |
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| Crew size (NAVIS type) | X | persons | ... | ... |
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| Shipwreck probability | X | per voyage | ... | ... |
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Follow each table with a prose note covering: what is well-attested,
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what is inferred, what is genuinely unknown and why.
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The confidence column is mandatory. Do not suppress uncertainty.
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A "low" confidence value honestly reported is more useful than a
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"high" confidence value that conceals a guess.
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---
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## 6. Sources to prioritise
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Primary sources (use where they give quantitative data):
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- Cicero's letters (EPISTVLAE AD ATTICVM, AD FAMILIARES) — commercial
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references are scattered but precise when present
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- Digest of Justinian — commercial law, contract types, liability
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- Diocletian's Edict on Maximum Prices (301 CE — later than our period
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but gives relative price structures)
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- Pliny the Elder, NATVRALIS HISTORIA — cargo weights, goods, routes
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Archaeological sources:
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- Monte Testaccio amphora deposit, Rome — olive oil trade documentation
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- Mediterranean shipwreck distribution (Parker 1992 is the standard reference)
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- Pompeii and Herculaneum commercial records
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Secondary scholarship:
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- Lionel Casson, *Ships and Seamanship in the Ancient World* (1971)
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- Peter Garnsey and Richard Saller, *The Roman Economy* (1987)
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- Nicholas Purcell on the Mediterranean trade system
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- Willem Jongman on Roman economic history
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---
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*Research brief — OTIVM / CIVICVS project*
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*Every parameter produced becomes a database record. Precision is not optional.*
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