That's not genetic entropy or at least, it's not why I meant. I may be using the wrong term but I'm fairly sure I'm not. I agree that arguments is rubbish. Entropy is basically the degrading of DNA over the generations. In humans there are 300 detrimental degradations of the human genome per generation and they are cumulative. They build up and up and eventually there are too many and it leads to extinction. I think the number was something like 80 thousand years before the problems build up to the point of extinction.