I should probably expand on my footnote. I'll start by saying that study after study has shown that innate differences between the male and female brain are either negligible or non-existent.

Obviously it has always been a 'him' because society has always unfairly placed men above women. We are making steps towards equality, but there is still a long way to go. However there is also the fact of societal gender roles. Aggression, ambition, and leadership, the sorts of characteristics that lead someone to want to become powerful, are traditionally expected male characteristics. A woman who is aggressive and ambitious is often seen (or portrayed) as straying beyond her prescribed role, likewise a man who is kind and nurturing.

What I am saying is that if for example we applied positive discrimination such that 50% of politicians are male and 50% female, then I think it would still be overwhelmingly men who become the corrupt autocrats... because of ingrained gender expectation. So it is not enough to apply equality simply in percentage terms, there is still the underlying issue to address: what society expects. I think we are making progress on this as well, but it's not generally as visible.