Shifting Involvements—a small masterpiece that illuminates the Tea Party, Occupy Wall Street, and protest movements of diverse kinds. Hirschman emphasized that human beings are often choosing between private and public life, and thus between the different forms of happiness that are associated with each of them. He described “pendular motions of collective behavior,” in which people swing from happiness to disappointment in one kind of activity, and then to the other. For example, the disappointments and frustrations of the student rebellions of the late 1960s encouraged a return to private life in the 1970s and 1980s. Rejecting the highly influential idea that the problem of collective action has a kind of invariable, ahistorical “logic,” Hirschman drew attention to the immense importance of history and timing as, in Adelman’s words, “people leave the streets and plazas disenchanted with politics to seek happiness in the shopping malls”—and vice versa.