Success, it seems, changes the chemistry of the brain, making us more focused, smarter, more confident and more aggressive and, the more you win, the more it will keep happening. But the downside is that winning can become physically addictive. By understanding what the mental and physical changes are that take place in the brain of a 'winner', how they happen, and why they affect some people more than others, Ian Robertson answers the question of why some people attain and then handle success better than others.