This document discusses concepts related to power and ideology from critical theory perspectives. It defines ideology as beliefs that justify social stratification and provides examples. Hegemony involves domination that masses can consent to or resist. Critical theory provides a framework for analyzing how power operates in society. Foucault questioned whether those deemed "mad" were truly sick, arguing that medical treatments instead control and oppress in the name of morality. Power has both negative and positive impacts according to Foucault, being productive in bringing discipline as well as oppressive.