Re: Building times
1) I believe Christopher addressed how few ships 5,000 rowers would be able to row. Accurately? That, I don't know for sure.
2) So in short, we know freemen were preferred in Ancient Greece and slaves who fought for Athens, at least, were freed after the battle and freeing before the battle was unusual in Syracuse. We also know Carthage might not keep promises to slaves, but even the Romans thought Carthage brutal, IMU.
3) Were those slaves building the long wall around Athens and crucial Roman aqueducts and military works in charge of anything critical to its success as a defensive measure, or did they just move heavy objects? And if so, were they given no motivation for success?
4) How often, how many and how much? And, again, were they given no motivation for success?