The controversy was manufactured after the fact by neo-social darwinists, who took it as scientific endorsement of their stealing from everyone. There have been scientific critiques of it too, most notably E.O. Wilson's recent rejection of it after years of endorsement. Mainly, however, it's a book about mathematical biology written to be understood by non-mathematical biologists, and many of its claims boil down to basic logic. That Wall Street corrupted it shouldn't be shocking considering what eugenicists did to Darwin.