The arguments that sustainability advocates have been making, which aren't working well enough, have been largely fact-based. (That's what often happens when you start out with empirical data.) But sales pitches based solely on fact went out almost a century ago. To get our point across these days, we need a spiel that evokes myth and emotion. To sell a political program in America, we need to resonate with the myth of American exceptionalism. To that end, some possible ideas for bumper stickers/slogans:Strength through Sustainability.