With all the social economic systems in the world, capitalism is still the supreme because several others have failed but capitalism is still standing despite it's flaws across the globe and even countries that have embraced other forms of economic systems have to realize that capitalism breeds individual quest to achieve development because there is a sense that you get to eat from your personal effort or profit compared to doing it for the state or even the community as other economic systems have professed to be the best.
It is better than what we had before, but it still has obvious, major flaws.
So it seems like something better could exist out there that doesnt have these flaws.