Clayton Cameron is referring to the commonality of all beats. Cameron provides a breakdown of various genres of music such as R&B, pop and Latin by making reference to their beats. He demonstrates how the various genres of music rely on math and in the process demonstrates the commonality of all beats
The fact that leaders get to contest in an election to win the mandate of the people so that they can lead ensures that they are responsive to their wishes. This is because voters will naturally elect people that are sympathetic to their issues