Others are convinced that the one specific personal action they take or one specific large-scale action will be enough to save the world if everyone did it, and they advocate for that single solution with the fervor of an evangelist.
To them, I say: there is no silver bullet, no, not even yours. But there is a lot of silver buckshot and that's even better news. We need to deploy as many solutions as we can, prioritizing what works best for a given person, place, or organization.
Project Drawdown has a great summary here: http://www.drawdown.org