I have followed the long thread below with great interest. My understanding is that to get an early space victory requires a number of factors: 1) A good map - this includes city states, room to expand and good terrain for adjacency bonuses. (My experience is that a good map will double your science output in the 1st 100 turns. 2) A suitably chosen leader, Pericles and Trajan seemed to be favoured, although I have a soft spot for Qin. 3) Early focus on culture (including 3 theatre strategy) to speed through the civic tree. 4) Micromanagement to reduce the cost of districts by not completing the tech or civic that opens a district not currently needed. 5) Globalization civic (although actually I'm not sure how important this is). 6) Accurate play (ie don't waste turns). 7) A good slice of luck. Have I missed, or not understood any of the conclusions? I suspect that the recent update that killed the overflow on space projects may mean that space victories will be a bit slower now.