Answer:
When the ancient Greek historian Herodotus wrote, "custom is king over all," he meant that the customs and traditions of a society have a powerful influence over the behavior and beliefs of the individuals within that society. In other words, the norms and practices that are accepted and followed by a particular group of people can hold a great deal of sway over the actions and decisions of those people. In this sense, custom can be seen as a kind of "king" that rules over the behavior of individuals within a society.