The starting distinction
Before “Western esotericism” had a name
People performed rituals, read omens and tried to speak with unseen powers thousands of years before anyone used the name Western esotericism. Some of those old practices mattered greatly to later magicians. That does not make them early chapters of one secret school. An Egyptian priest, a Greek philosopher and a medieval Jewish mystic did not think they belonged to the same tradition. Even the word esotericism is fairly recent. Historians use it now because it lets them compare related ideas without pretending that the people who held them all agreed.
In this study: Prehistoric ritual culture Wider setting: Western esotericism on Wikipedia ↗