New Scientist offers an absolutely despicable article called "How to control a herd of humans" (link) which discusses research into how political leaders control groups of people through coordinated activities such as singing or engaging in activities as a group: ...Scott Wiltermuth of Stanford University in California and colleagues have found that activities performed in unison, such as marching or dancing, increase loyalty to the group. "It makes us feel as though we're part of a larger entity, so we see the group's welfare as being as important as our own," he says... While the name of...