Large ship propulsion. (Orion revisited)

[Ryan_m_b]

Assume you have what you need (faster than light travel, positronic brains or time travel) and then analyze the possible consequences

Very true. In that vain a society that can build an interstellar transport most likely already have established many methods of intrastellar transport. That would be interesting in how those colonies (if they are colonies) work, how they established environments, how their society works, economy, relation to Earthbound nations etc etc.