Marx suggested (ambivalently, as it is not often noted), that religion was the opiate of the masses.
In Selling Spirituality, Jeremy Carrette and Richard King suggest—in the spirit of Marx—that contemporary spirituality is the prozac of the masses.
Or, in their own words:
Privatised spirituality emerges here as the new cultural prozac bringing transitory feelings of ecstatic happiness and thoughts of self-affirmation, but never addressing sufficiently the underlying problem of social isolation and injustice. (77)