I've only recently gotten into the game (lovin' it, btw) and played the Humans. I've won a crushing Cultural victory without a single military/defensive ship or structure being built (my military rating was 0, while the Drengin were over 200). My diplomacy helped me stay on good terms with all the other races while they waged war with each other.
Towards the end, I was able to buy up most of the advanced military tech available (again, due to high diplomacy, influence and the decent amount of money I was raking in by the end of the game).
My question is this: Is it ever possible for a non-military culture to play to their strengths AND wage a successful war? (or at least defend themselves if attacked)
If so, how? It seems like the ability to only research one tech at a time severely limits this.
Any battle-tested strategies are welcome!