When it comes to global problems like climate change, it can be easy to feel as though your own individual efforts to stop it are too small to make a difference. But then when you consider the big players whose efforts could make a difference—the corporations, the political parties—making them do the right thing just seems too daunting and complicated a task. What to do when individual efforts seem too small to matter, but structural change seems too big to effect? This week, the authors of a new book talk about taking a middle path.