Growing up, I was taught that a man has to defend his family. When the wolf is trying to get in, you gotta stand in the doorway.
We would solve a lot of huge problems that are causing massive suffering. Poverty, violence, homophobia, heterosexism, racism, the environment - all these things that are crippling us. We need big, bold, dangerous, crazy ideas to solve these problems. When failure is not an option, innovation and creativity are not options.