props for the best butcher of "friendly" I've ever seen ... re: WFYABTA: Each leader has a set number of techs they'll let you get via trade/peace extortion/tribute/gift over the entire game. The specific number depends on the difficulty level and leader. All techs are equal (even partially researched ones) when it comes to WFYABTA; but an AI only knows about techs you've received since you made contact - if S takes the peace and trades, the four techs will not count against WFYABTA for the leaders he hasn't yet met. Also, every time you advance an era, all the leaders "forget" one tech you've received. As has been mentioned, WFYABTA is overridden if the leader in question is friendly. "We would rather win the game" is different from WFYABTA - it applies to space race techs, which (afaik) you can never trade for from an AI. As for the tech trades/peace offer, I'd say it comes down to whether or not you benefit from them immediately. You also already got archery and meditation from trade, so that's 2 against you ... as much as it seems silly at first to give up a "free" tech, you may want to take only 1 or 2 of HC's techs.