Social activity of a man in the discourse of secular theology

The article deals with understanding of social activity of a man in the concepts of secular theology that emerged in the XX century, particularly in D. Bonhoeffer and T. Altizer who formulated the ideas of «non-religious Christianity» and «Christian atheism». The author explores these ideas and their social role in the light of the problem of alienation of a man and Christian principle of «existence for others».