When we perform synchronized activities we bond together and work better together. Stanford University researchers found that when volunteers were asked to walk in step together around campus made them more willing to work together and cooperate better with each other afterwards.
It doesn’t even have anything to do with positive emotions created by the synchronized activity. It is simply the action in itself that causes the unified feeling. Practicing sports with your team and doing drills in unison are therefore really important.
So, singing together, reciting chants, and walking together are just a few examples of synchronized activities that bring unity to people. It doesn’t matter what you say in the song or chant, either. The point is the motion and act of doing it in unison.
The researchers concluded that synchronized activities may have evolved as a way for society to get individuals to willingly work together and sacrifice for the good of the group.