It is interesting to compare Durkheim and Marx on their ideas about modern consciousness. Durkheim focused on social solidarity as one of the important functions of a social order: individuals had a defined place in the world that was created and reinforced by the social values of morality, religion, and patriotism. He observed that these strands of solidarity are stronger or weaker in different societies, and he also observed that some modern social forces tend to break down these moral strands of social cohesion -- the creation of large cities, for example. In his theory of suicide, he highlights the situation of "anomie" to refer to the circumstance of individuals whose relationship to the social whole is weak, and he explains differences in suicide rates across societies as the result of different levels of solidarity and its opposite, anomie.
Marx's concept of alienation involves a somewhat different kind of separation and breakdown -- separation of the person from his/her nature as a free producer and creator, and separation of the person from his/her natural sociality. Marx thinks of affirming social relations as founded on equality and freedom. So modern capitalist society is destructive of true sociality.
What is interesting in this comparison is that both Durkheim and Marx appear to be diagnosing a similar feature of modernity. In Durkheim's case there is an implicit contrast between a pre-modern world in which individuals have a well-defined social and moral place and the contemporary world in which these strands of solidarity are breaking down. In Marx's case the contrast is forward-looking. Marx compares the present -- the factory -- with the future -- a society of free, equal, social producers. But in each case the theorist is grappling with an absence in modernity -- an absence of a social and moral setting that gives the individual a basis for self-respect and sociable collaboration with others. The social itself is