This important book is needed today. The challenges that Christian churches face have changed immensely in the last quarter-century. One of the central issues facing the churches everywhere in the world is their missionary presence in their nations and societies. The authors of this volume are among the world’s leading missiological thinkers and represent major Christian traditions in Europe, Africa, and North America. In this new century, the Christian church faces new situations that include, for example, the fall of communism; the globalization of culture; cultural and religious minorities and multiple religious majorities in nearly every country; ethnic and interreligious tensions; relativism and individualism in Western culture; the rise of a global impact of a postmodern world view; poverty in poor countries and in urban areas in wealthy countries; and the decline of Western cultural authority and, with notable exceptions, of religious authority generally. This book speaks of ways in which Christian churches are seeking to respond to these challenges. The purpose of this book is to describe some of the main challenges facing the churches in mission today, particularly with reference to inter-religious conversations all over the world. The title of this volume has been derived from the theme of the 24th General Assembly of the World Alliance of Reformed Churches (WARC) at Accra in August, 2004 whose theme is, “That All May Have Life in Fullness.”