Who says we haven't? We're blissfully unaware of most of human thought because it isn't acted on in such as way that we become aware of its existence. YC is a g

Who says we haven't? We're blissfully unaware of most of human thought because it isn't acted on in such as way that we become aware of its existence. YC is a great example of this, to a certain extent PG started it because there was no possible way for him to carry out every idea he came up with, so he created an environment where he can involve himself with other people who have ideas that he's had or likes. I'm not entirely behind the "ideas are worthless" camp. They're worth something (after all, you do have to execute on SOMETHING that had to be thought of prior to), but most of a company's value is still derived from the fruition of its core idea.