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 richest man in Africa is Onsi Sawaris, from Egypt. He has been ranked 129th richest man in the world by Forbes's at a net worth of $4.8 billion.His companies, Orascom Telecom and Orascom Construction Industry, rate amongst the largest companies in the world, 1301 and 1763 respectively in position.Aliko Dangote. Net Worth: $13.8 Billion. Nigeria Richest Person: #1.he richest man in the world is Carlos Slim Helu with a Net worth of $74 Billion dollars, he is the founder and owner of TELMEX which controls about 80-90% of Mexico's telepho â¦ ne lines and across Latin America, currently he has 250,000 employees working for him and is involved in over 100 companies.