During his 12 years as boss of bp, John Browne was the master of many complicated briefs. He launched three big takeovers, sparking a wave of consolidation that reshaped the industry; to the horror of his peers, he admitted that oil firms had a part to play in the fight against global warming; he invested in Russia's lucrative but lawless oil business with much greater success than other Western oil firms-and he made pots of money for bp's shareholders, year after year.
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