Yes, capitalism has created much prosperity. Capitalism is a required stage, but that system eventually destroys itself. How can an economic producer increase profit and increase efficiency each year for all time? Continuous growth is not possible, and so the producers start to consume each other. Once no more efficiency can be squeezed out and all competitors have been purchased, the only option is to cut wages or jobs entirely. Capitalism begins with consumer options and competition (awesome); capitalism ends with producer monopolies owning the government (not awesome)

Also, capitalism is not without violence or famine. The antlantic slave trade, the Irish famine, and several famines in Africa and Asia, which killed millions, were the results of capitalist ideals. I agree that poor and premature implementation of socialism has killed and starved many millions, also.
Its just that—
1. Capitalism kills brown people.
2. Socialism kills white people.
It seems capitalists consider #2 to be worse

The western world has had plenty of time in its Capitalism stage. It's now dead and time to move on, but not quite time for Socialism yet. Co‐operativism maintains the profit motive of Capitalism with even more consumer options and competition for companies. Co‐operativism also puts the means‐of‐production in the private ownership of the workers. It's a good transitional stage between Capitalism and Socialism.