The individual corporations are ideas, and then of course there's the idea of the corporation itself. As the post notes, corporations only work because of other ideas about property rights and scarcity. But more fundamentally they only work because they're an idea quite a few people already believe in.
I'm a little fuzzy on the level at which the post means "autonomous ideas" will steer society--do they mean autonomous ideas like Unix? Or autonomous ideas like governments and corporations and pope-less religions?
I think the post helps draw a latent curiosity out of me that I probably wouldn't have put quite like this, but: can we better identify and allocate resources towards good ideas that don't make market sense?