It's a fine line. You need people who share the vision, to help carry it out and lend support. But if you're deluded, then you become another person imposing their limited view on the world. What is absolutely clear is that you can't seek permission from others or else the worst will exploit that to deny you. Seeking consensus is a form of altruism, which is only suited for people of your own kind who share your values. There it works to get the best ideas to the top, and build strong support. Within diversity it again just lets the worst elements dominate.