The US was the first country in history to end the specter of famine. This happened in the early 1800s as a direct result of capitalism. By the end of the 1800s, US citizens were the best fed in the world. Even the poor had access to fresh vegetables (thanks to railroads).

You can see this in the statistics for average height, which shot up all through the 1800s. Other countries did not really catch up until after WW2, and then only when they turned to capitalist agriculture.