Every single person I've come across using r/K selection theory to describe human affairs has been defining themselves as a "K". This is an observation, not a value judgement on my part. I believe it is a value judgement on the part of the users, though.
I am not saying the books are "wrong", or that the scientific theory is flawed. I am saying people keep misappropriating the theory to serve their ideological needs. Anonymous conservative? Just reading through the synopsis of the book reveals its conservative bias. This is all I have to say about this at the moment. I won't try to argue people out of their dogmas, especially when they serve as a backbone to their identity as a superior human being.