Although he was an important reformer of Indian society and its religious practices, the Buddha’s concerns addressed the individual, not the fixing of social systems.
To answer this question accurately, one would have to research every Buddhist denomination and enclave in the world throughout Buddhism’s long history.
What I’d like us to consider in this essay are two themes 1) according to the Dharma, we can only liberate ourselves, we can’t transform another person (and if we take a moment to consider the intractability of our own unskillful sankharas—habit formations—it becomes clear that our very best efforts to change ourselves yields slow results); 2) it’s possible that we aren’t raising anyone, but that we are simply in relationship.