Book VI: The Druids & the Gerundive of Obligation

You’ll be able to

Translate the ethnographic description of the Druids and Gallic society
Use the gerundive of obligation (passive periphrastic) with the dative of agent
Compare Caesar’s portrayal of Gallic and Roman customs as rhetorical framing

An ethnographic pause

In the middle of Book VI Caesar interrupts the war narrative with an excursus on the customs of the Gauls and Germans. He divides influential Gauls into two classes: In omnī Galliā eōrum hominum quī aliquō sunt numerō atque honōre genera sunt duo (“In all Gaul there are two classes of those men who are of any account and rank”) — the Druidēs (priests) and the equitēs (knights/nobles). The Druids conduct religious rites, judge disputes, and are exempt from war and taxes. This ethnography both informs Roman readers and, by cataloguing Gallic “otherness,” subtly justifies conquest as bringing order.

The Druids and their training

Caesar reports that the Druids memorize vast amounts of verse over many years and deliberately avoid writing their doctrine down: neque fās esse exīstimant ea litterīs mandāre (“they think it is not permitted to commit these things to writing”). Note fās esse (“to be right/permitted,” with the infinitive mandāre) inside an indirect statement after exīstimant (“they think”). Caesar attributes reasons to them — to guard secrecy and to strengthen memory — presenting Gallic religion with an anthropologist’s curiosity that also frames it as alien to Roman practice.

The gerundive of obligation

To express duty and necessity, Caesar uses the gerundive + esse (the passive periphrastic): a gerundive (“-ndus, -nda, -ndum”) agreeing with the subject, plus a form of sum, means “must / ought to be … -ed.” The agent goes in the dative. Caesarī omnia ūnō tempore erant agenda = “All things had to be done by Caesar at one time” (i.e., “Caesar had to do everything at once”). This construction pervades Caesar’s accounts of pressing decisions, conveying the obligations bearing on a commander. Spot it by the gerundive ending plus esse and hunt for the dative of agent.

Worked example

Translate and analyze: “Caesarī omnia ūnō tempore erant agenda.” (DBG 2.20, a model of the construction)

1.Find the gerundive: “agenda” (“to be done”), neuter plural, agreeing with the subject “omnia” (“all things”).
2.Find the verb “to be”: “erant” (imperfect) — gerundive + esse = passive periphrastic, expressing obligation: “had to be done.”
3.Find the dative of agent: “Caesarī” (dative singular) = “by Caesar.”
4.Assemble literally, then idiomatically: “all things had to be done by Caesar at one time” → “Caesar had to do everything at once.”

Answer: “All things had to be done by Caesar at one and the same time,” i.e., “Caesar had to do everything at once.” The gerundive “agenda” with “erant” forms the passive periphrastic of obligation, and “Caesarī” is the dative of agent — conveying the crush of simultaneous demands on the general.

Tip

Two flags identify the passive periphrastic: a gerundive (ending in -ndus/-nda/-ndum) and a form of esse. Then look for a dative naming who is obligated — translate it as the doer: mihi faciendum est = “it must be done by me” = “I must do it.”

Checkpoint

In the passive periphrastic “Caesarī omnia … erant agenda,” what does “Caesarī” express?

On the exam

Caesar’s ethnographic excursus is prime material for essays on cultural framing: analyze how describing the Druids, Gallic class structure, and “barbarian” customs both informs Roman readers and casts the Gauls as an “other” whose conquest looks natural. Cite the Latin distinctions (Druidēs vs. equitēs, the ban on writing) as evidence.

Checkpoint

According to Caesar, why do the Druids refuse to commit their teachings to writing (“neque fās esse exīstimant ea litterīs mandāre”)?

Answer the 2 checkpoints as you read.