Hanna Rosin

There are always signs that a reign is ending, and they are usually spotted not in the king himself but in his court. In the inner circle, latent jealousies between advisers spill into open conflict, as they angrily debate who is to blame for the calamity, chewing over each other's past errors and pointing the finger at old and nascent enemies.

Evolutionary psychology tells us that men, especially powerful men, feel invincible and entitled to spread their seed, and that women can't resist the scent of masculine power. Women, by contrast, are said to be more altruistic and collaborative, seeking power so that they can share it with others.

I was still young when I missed Beijing. I was favourite to win a medal but I knew I had time. My coach advised me to stay at school and finish my exams. Even if I had gone and won the Olympics, I might not have handled the pressure. So I moved on.