The document discusses how sustainability requires localization. It argues that localization leads to greater accountability, lower carbon footprints, and economic prosperity through keeping money circulating within communities. Specifically, it recommends three rules for local prosperity: maximizing local ownership of businesses, maximizing local self-reliance through things like green energy, and spreading models of businesses that benefit environmental, social, and economic goals. Localization is seen as key to providing for a community's needs now and in the future without preventing other communities from doing the same.