Karl Marx said what about religion Why might this be significant?

Karl Marx famously described religion as the "opium of the people," suggesting that it serves as a tool to placate and distract the working class from their suffering and exploitation under capitalism. This perspective is significant because it highlights how religion can function as both a source of comfort and a means of social control, potentially hindering efforts for social change and justice. Marx's critique invites deeper analysis of the interplay between ideology, power, and economic structures, emphasizing the need to address material conditions rather than solely relying on spiritual solutions.