 There remains some debate as to whether the causes of teenage rebellion are completely natural or necessary.Some posit that an adolescent's failure to achieve a sense of identity can result in role confusion and an inability to choose a vocation, and/or that these pressures may develop from being viewed as adults.Indeed, in the Western world the age at which one is considered an adult (in both the cultural and legal sense) has advanced from the early teens in earlier centuries to the late teens – or even, in today's society, one's early twenties.