I remember studying effervescence in school, the social phenomenon of collective energy enveloping the whole. There are no better examples than the sports stadium. People yell and cheer in unison, and the energy takes on a mind of its own. Add flames into the mix, and you can’t get more rabid human emotion than that. If only we could build up this energy around things that matter. Imagine if we could harness it, if people became excited about political elections and climate change summits and economic conferences. If we had an engaged, motivated populace seeking everyday to live sustainably, to make the world better for our children. We must take from the stadium and use effervescence in the real arena: the world outside.