A lot. Some good and some bad.
the bad:
religious sects wars in Europe.
Crusades
Oppression of natives in many countries.
Oppression of science discovery. Galileo and ex-communication because he de declared his Scientific theory that the earth rotates the aroud the sun and not the other way around.
The persecution of the Jews as the killers of Christ.
The murder and explusion of Muslims in Spain.
Some Christian sects taught that blacks have curse on them and to serve the white man as redemption that Cain had killed Able.
