Sustainability is an ideal. Its principles reinforce that everything you do has consequences, even when they’re hidden from view. Its worldview imbues you, as either a consumer or producer, with a clear, undeniable sense of responsibility. It gives you a role—to change how you think, what you make, and what you buy—and confirms that your actions matter. Finally, it reinforces that we’re both the cause of all that ails us as a society, and the solution. Only you can decide which path to follow.