Wow, talk about moving the goal posts. I was pointing out that capitalism has not always been the universal economic system, and now you're trying to make me explain why years of exploitative colonialism and corrupt authoritarianism haven't yielded a better alternative. Well, isn't it obvious?
300 hundred years ago, every country in the world was ruled by an absolute monarch, and that fact alone was considered persuasive explanation of divine will: the world must always be thus. Since then, the philosophy of rulers has changed, but small-minded apologists for the status quo have not evolved in their thinking. "If our current approach isn't the best option," say the small-minded apologists, "why isn't anyone doing anything different?" The answer to that question, in case it wasn't obvious, is the same as it was 300 years ago: entrenched interests.
Are you seriously arguing that it is impossible to allocate today's abundance of resources in a more fair and productive way than our current system does?