 In spite of this diversity of definitions, there has been very little philosophical analysis of the term “evolution” itself. This dearth forms a stark contrast to the voluminous literature in the philosophy of evolution; indeed, for a long time the  philosophy of biology  was focused almost entirely on evolution. Thankfully, that is no longer the case, with philosophers turning their attentions to issues in genetics,    molecular biology,   cell biology,    ecology,    developmental biology,   microbiology, and more. It may be, as Theodosius Dobzhansky famously said, that “Nothing in biology makes sense except in the light of evolution” (1973: 125), but much of biology is not evolutionary biology. Still, though, philosophy of evolution remains a growing and vibrant area within the philosophy of biology.