Free market capitalism is the most productive, and even more importantly, the most moral mode of human interaction ever devised. It allows for the most individual autonomy available in large societies such as ours, while still providing all the goods and services required to live as well as humanity ever has. It also provides virtually infinite opportunity for those simply willing to participate.
While far from a perfect system, it does the job of providing for the creation and distribution of all the things that make the modern world so marvelous, in the most efficient and voluntary manner possible. No other system of human interaction ever devised even holds a candle to the free market, as far as human prosperity and dignity are concerned.
This reality is indisputable by anyone willing to look at the history of humanity, and the dregs most of us existed in before individual rights respecting social orders took off in ernest. Individualism and Capitalism are the most beneficial things that have ever happened to humanity, across the board, irrefutably.