The Christianity Reader - Paperbackby Mary Gerhart (Editor), Fabian Udoh (Editor) Christianity is the world's most populous religion, with some two billion adherents. As a world religion, Christianity has flourished because it is capable of taking on new forms in new contexts. To understand both the religion's history and its present state, Mary Gerhart and Fabian Udoh gather original texts from early Christian writings to contemporary documents on church related issues in The