The twentieth century has been marked by an unprecedented outburst of religious activity on a world-wide scale, and in particular by a mushrooming of numerous religious movements. This work, first published in 1987, takes a fresh approach to the understanding of this phenomenon, an approach which takes into account new concepts of human nature and of religion.

The twentieth century has been marked by an unprecedented outburst of religious activity on a world-wide scale, and in particular by a mushrooming of numerous religious movements. This work, first published in 1987, takes a fresh approach to the understanding of this phenomenon, an approach which takes into account new concepts of human nature and of religion.