Ok, I'll give my own as well. I'm not that great at GalCiv (I have had the game for like 4 days now, and boy did I lose many many games when I started playing... I'm starting to grasp it now though !)
The latest game I've played I had Pacifist (+20% social production, + 20% influence), "Dont't Ask" pop. grwoth (+80%) and +30% social production if I remember correctly.
My only hitch is that I don't see anything different with my social/military production, so I'm going to put those points elsewhere. But the 80% population growth really helped me, it's like if my people were darn rabbits.
Also, the game that I won with that, ok so it was with low-intelligence AIs, but I won without destroying a single ship OR having a single ship destroyed. That's right, I never fired even a shot

Now I'm trying with higher-intelligence AIs, I fear for my life