Religious conversion implies far-reaching changes in the lives of human beings. It can be burdensome for inter-church relationships and lead to conflicts between religious communities. Change of adherence as an expression of religious freedom challenges many social relationships as well as state laws affecting religion. The 36 authors from Europe, Asia, Africa, and the Americas analyze in 43 studies various aspects of religious conversion. Approaches which are representative of specific denominational, cultural, and contextual frameworks in World Christianity are analyzed and compared. Likewise, understandings of religious conversion in Muslim societies and states, in Hinduism and religious traditions in China are explored.