Some recent studies again show that humans are influenced by crowds:

In fact, recent studies suggest that our sensitivity to crowds is built into our perceptual system and operates in a remarkably swift and automatic way. In a 2012 paper in the Proceedings of the National Academy of Sciences, A.C. Gallup, then at Princeton University, and colleagues looked at the crowds that gather in shopping centers and train stations.

In one study, a few ringers simply joined the crowd and stared up at a spot in the sky for 60 seconds. Then the researchers recorded and analyzed the movements of the people around them. The scientists found that within seconds hundreds of people coordinated their attention in a highly systematic way. People consistently stopped to look toward exactly the same spot as the ringers.

The number of ringers ranged from one to 15. People turn out to be very sensitive to how many other people are looking at something, as well as to where they look. Individuals were much more likely to follow the gaze of several people than just a few, so there was a cascade of looking as more people joined in.

In a new study in Psychological Science, Timothy Sweeny at the University of Denver and David Whitney at the University of California, Berkeley, looked at the mechanisms that let us follow a crowd in this way. They showed people a set of four faces, each looking in a slightly different direction. Then the researchers asked people to indicate where the whole group was looking (the observers had to swivel the eyes on a face on a computer screen to match the direction of the group)…

If you try the experiment, you can barely be sure of what you saw at all. But in fact, people were amazingly accurate. Somehow, in that split-second, they put all the faces together and worked out the average direction where the whole group was looking.

In other studies, Dr. Whitney has shown that people can swiftly calculate how happy or sad a crowd is in much the same way.

Humans are social creatures. This can be hard to remember within societies and time periods when individualism is stressed and people think of themselves as above group behavior. Of course, group behavior varies quite a bit given the context but we often go along with the crowd.