I'll cop to not having read much of Sen, but he seems like a clear odd one out in your list. He respectfully tips his hat to a few Marxian ideas in his work (see e.g. pages 14 & 15 of "The Moral Standing of the Market", and the handful of shoutouts to Marx in On Economic Inequality), but I got the feeling he was more of a centre-left liberal than a hard leftist. See also: an actual commie's Amazon review complaining that Development and Freedom is too pro-market, centrist, and wishy-washy.
Moss_Piglet claimed democracy and marxism were religious in character. Sen is arguably wishy-washy in his Marxism (though you can be pretty far left and still be very harshly criticized by some communists for not being left enough), but there is nothing remotely wishy-washy about Sen's commitment to democracy.
People want to tell everything instead of telling the best 15 words. They want to learn everything instead of the best 15 words. In this thread, instead post the best 15-words from a book you've read recently (or anything else). It has to stand on its own. It's not a summary, the whole value needs to be contained in those words.
I'll start in the comments below.
(Voted by the Schelling study group as the best exercise of the meeting.)