will always stigmatize some conditions and some behaviors because doing so provides for group solidarity by delineating 'outsiders' from 'insiders'."

Falk describes stigma based on two categories, existential stigma and achieved stigma. He defines existential stigma as "stigma deriving from a condition which the target of the stigma either did not cause or over which he has little control." He defines Achieved Stigma as "stigma that is earned because of conduct and/or because they contributed heavily to attaining the stigma in question."