Zimbabwean opposition leader Morgan Tsvangirai died Wednesday of cancer in South Africa at the age of 65. In 2000, Tsvangirai founded the Movement for Democratic Change, which challenged longtime leader Robert Mugabe’s grip on power. In response, he was repeatedly arrested by Zimbabwean authorities and subjected to beatings and torture while in jail. In 2008, Tsvangirai withdrew from a presidential election after leading in the first round of voting, after Mugabe’s security forces carried out a campaign of violence against his supporters. Between 2009 and 2013, Tsvangirai served as Mugabe’s prime minister in a power-sharing agreement.