I suppose because of Darwin's 200th birthday, I'm starting to be asked to speak to general audiences about how philosophers think of evolution by natural selection. It makes me think about the various audiences we speak to. I think it is tough enough to speak to our own kind (given the liveliness of the debates). But, what to do when the audience is of general philosophers, some of which are skeptical about whether we are "doing philosophy" at all? And, what about a general audience (from elementary school kids to retirees)?