Views on suicide have been influenced by cultural views on existential themes such as religion, honor, and the meaning of life. Most Western and Asian religions—the Abrahamic religions, Buddhism, Hinduism—consider suicide a dishonorable act; in the West it was regarded as a serious crime and offense against God due to religious belief in the sanctity of life. Japanese views on honor and religion led to seppuku being respected as a means to atone for mistakes or failure during the samurai era. In the 20th century suicide in the form of self-immolation has been used as a form of protest. Self-sacrifice (thus saving lives of others) for others is not usually considered suicide.