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I'm sad to hear this news, and it's appropriate that many of the comments are more personal than I'm in a position to write.  A quick view on TS's intellectual contributions, though: Game theory is one of the big ideas in social science from the second half of the 20th century, but sometimes limited by the temptation (some would say methodology) of firmly specifying the rules, payoffs, and available moves in advance.  That's the approach more inspired by parlor games, which were part of the early thinking.  But often it's (also) helpful to think about how players can "change the game".  A lot of what TS did in game theory was to insist on that topic, and enrich the field by constantly going beyond analysis of how you'd expect players to behave "within" the game as perhaps less imaginatively specified.A great and intellectually courageous mind.