Angola has vast mineral and petroleum reserves, and its economy is among the fastest-growing in the world, especially since the end of the civil war. However, economic growth is highly uneven, with most of the nation's wealth concentrated in a disproportionately small sector of the population and highly concentrated in China and in the United States. The standard of living remains low for most Angolans; life expectancy is among the lowest in the world, while infant mortality is among the highest. 