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.
the leader of zimbabwe since its independence in 1980 robert mugabe 1924 is one of the longest serving and in the latter years of his reign most infamous african rulers trained as a teacher he spent 11 years as a political prisoner under ian smith s rhodesian government