Deviance is defined as behavior that departs from social norms and expectations, as judged by members of society. It can include expressing radical political or religious beliefs, or behaviors that stray from what is accepted by a group. Whether something is seen as deviant depends on cultural norms and can vary between groups. Deviant behavior may be tolerated, approved, or disapproved depending on how closely it aligns with ideal standards within a society or culture. In some cases, deviance may be viewed as pathological if it is believed to stem from mental illness or disorder.