Luc Ciompi, who coined the term "affect-logic," and Elke Endert show impressively how a strong sense of belonging has influenced the course of history - and still does. Hitler's rise to power, the Israeli-Palestinian conflict and the current issues between the Islamic and Western world are taken as examples. During the surprising election of the American president Barack Obama positive collective emotions played a vital role. The authors claim that similar fundamental correlations between feelings, reasoning and behaviour can be observed daily in human interactions, whether in families or companies. This interdisciplinary essay shows that emotions are the driving force and organizer in all micro- and macrosocial events.