1. Inequalities which are entrenched - that is - which remain relatively untouched over generations - are more dangerous for a society. 2. If in a society certain classes of people have enjoyed considerable wealth - and the power which goes with it - over generations - the society would become divided between those classes and others who have remained poor over generations. 3. Over time such class differences can give rise to resentment and violence. 4. A large number of studies confirm a consistently positive relationship between physical fitness and health. 5. Because of the power of the wealthy classes it might prove difficult to reform such a society to make it more open and egalitarian.