The last man on Earth

There's a reason why women will soon become the most powerful and dominant speicies on the planet and it's not because they are more intelligent than anything that breathes.
The reason will not be down to numbers either. Just because you have more people in a gang holding rocks doesn't mean you'll bash all our heads in.
The reason is simple - men, will eventually kill each other off. We're doing it at a rapid rate that appears to have no end in sight. Before we know it they'll be one guy left, and he'll assume that he's one lucky sod. He'll have plans to embark on a quest to repopulate the planet and go about this task with fervour.
In reailty I doubt it'll pan out like that but sometimes guys are a little optimistic when they think the odds are stacked in their favour.