Congolese dictator Mobutu Sese Seko became notorious for corruption, nepotism, and the embezzlement of between US$4 billion and $15 billion during his reign. Socialist governments influenced by Marxism, and the land reform they have enacted, have also contributed to economic stagnation in Africa. For example, the regime of Robert Mugabe in Zimbabwe, particularly the land seizures from white farmers, led to the collapse of the country's agricultural economy, which had formerly been one of Africa's strongest; Mugabe had been previously supported by the USSR and China during the Zimbabwe War of Liberation. Tanzania was left as one of the world's poorest and most aid-dependent nations, and has taken decades to recover. Since the abolition of the socialist one-party state in 1992 and the transition to democracy, Tanzania has experienced rapid economic growth, with growth of 6.5% in 2017.