Effective altruism started with global poverty and animal suffering. Now it's at the center of AI discourse. We asked the movement's co-founder @willmacaskill how this happened, and what he thinks about the allegations against it. "As a movement, it's a collection of people who are kind and nerdy. They often got into this via concern for people in poverty, or via concern for animal suffering." "Why the focus on AI? I think if you just really look at the arguments, the idea that we're gonna…