It will be different for us. Sport is one obvious substitute for battle. The time, money and the attention it attracts seem to grow all the time. The rise of the sports superstar has perhaps only just begun. The time is not yet ripe for Michael Jordan to run for office, but it is a fair bet that one of his successor superstars will be president of the US in the first half of the next century.
Business is another possible outlet for male aggression.
Newspaper layouts which put the sport and business sections together recognise the similarity. Where business can package identity and aggression, as sport does, it should do well. Computer games are good on aggression but are only just beginning to work on identity. Rock music manages the combination rather well. At the same time the long peace may give opportunities for those who are less aggressive.