The term BC/BCE refers to

BC stands for Before Christ and BCE stands for Before Common Era. They refer to the time previous to Jesus's estimated birth year. BC is used by people who follow a religion that believes in Christ, while BCE is a more diverse way to say it for the people who do not follow a religion that believes in that.  

the protestant reformation's started in 1517, disturbing the religious and political order in europe´s catholic countries. the outcome was the european wars of religion prosecuted in europe in the 16th, 17th and part of the 18th century. nonetheless, uprisings, territorial disputes, and great power conflicts were also causes of the wars.  

racism and segregation.