In the classification of religious organizations based on early theories of max weber, ernst troeltsch, and richard niebuhr, which religious organizations are considered to be the most established

Religious organizations that are considered to be the most established based on the early theories of Weber, Troeltsch, and Niebuhr are the CHURCHES. They play a massive role in giving influence on culture and beliefs of religious people. Also, the most significant percentage of charitable giving goes to churches every year. 

the answer to your question is,

old stone age.

-mabel < 3