There may be no single cause of bipolar disorder (aka manic depression). Instead, research indicates the causes of bipolar disorder are probably a combination of biochemical, genetic and environmental factors that may trigger and perpetuate the chemical imbalances in the brain.
Net worth: $829 million. Telecommunications mogul Strive Masiyiwa is widely regarded as the richest man in Zimbabwe and is one of the richest men in Africa with a net worth of more than US$800 million.
Top ten most successful entrepreneurs of the world include Aliko Dangote. The 56 year old Nigerian born business entrepreneur is just currently CEO of the Dangote Group. He was just born on 10th of April of year 1957. He is just currently richest person in the Africa with estimated net worth of around $25 billion.