Children growing up in these communities are taught that the outside world is very satanic and that gender inequality is acceptable. Men also make terrible fathers. Studies show that the children of poor men have higher survival rates than the children of rich men, but they only survive to age 15. One study found that children under 10 were 11 times more likely to die from malnutrition, poor health and abuse. (Henrich, 2011) 2. Polygamous relationships contain a great deal of domestic violence. Conflict between co-wives can also be a source of abuse through jealousy. Dr. Henrich, a psychologist, "reveals no cases in which relationships between co-wives can be described as harmonious." Most relationships actually set sleep schedules to prevent this