What did some people want to reform the catholic church in the 1400s

1)if a revolution merely replaces one authoritarian ruler with another, is it still a a revolution? a turning point? 2) “the great events of history have a way of defying ideological manipulation”, according to serge schmemann, a pulitzer prize winning journalist. do you agree, why or why not? other thoughts?

What was martin luther king, jr., referencing in the passage that brought him to lead a protest in birmingham?

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?