I'd suggest reading the Nature article linked in the top comment by hn user mazsa. Alternatively, you can follow the links and read the actual papers outlining

I'd suggest reading the Nature article linked in the top comment by hn user mazsa. Alternatively, you can follow the links and read the actual papers outlining the data. But in answer to your question, the actual data says none of those things. The data says ONLY that male populations DECREASED long long ago. And they decreased throughout the world. Europe, MidEast, Asia, Africa, Americas. (Though the numbers indicate that whatever happened, more of it happened in Europe and MidEast regions than anywhere else. Consistent with data that hunter-gatherers proximate to agriculturalists fared particularly poorly in this regard.) The reasons presented to explain this decline are just hypotheses. But they, (clan wars), are plausible to me. (Given my lay understanding of history. Which means exactly nothing. As in most science, it's the data that's meaningful here, and that's what you should pay attention to.)