According to psychologist Barbara Fredrickson, the fundamental essence of love is the same across all relationships, whether between romantic partners, parents and children, or total strangers. In her book Love 2.0: How Our Supreme Emotion Affects Everything We Feel, Think, Do, and Become, she claims that “love blossoms virtually anytime two or more people . . . connect over a shared positive emotion.” Fredrickson says that although such experiences may be fleeting, their physical and psychological effects lead to deeper bonds and even improved health. Her current research investigates these “micro-moments” of love.