Behaviour which transgresses a given system of morals; incorrect behavior. Liberal and conservative Christians differ in many matters over what is moral, even though both sincerely believe that their positions are biblically based. Moral standards change over time, even within a given religious group. Church schisms were common in the mid 19th century over slavery because parts of a denomination considered slavery to be profoundly immoral, while other believers believed that it was condoned, regulated and accepted by the Bible. Major moral shifts over the past 150 years have involved slavery, inoculation of children, birth control, abortion, sexism, racial segregation, discipline of children through the use of pain, and homophobia.