We all know people who prefer to follow the rules, and others who prefer to flout them. Psychologist Michele Gelfand defines these two ways of being as "tight" and "loose." She says the tight/loose framework can help us to better understand individuals, businesses, and even nations. This week, we look at the core traits of tight and loose worldviews, and how they may shape our lives — from interactions with our spouses to global efforts to fight the coronavirus.