Of late there has grown in African Catholicism the concept of Church as the Family of God, Familia Dei, which has enhanced greater social cohesion among the members of the Church and strengthened interpersonal relationships among them. This book is an endeavour to offer a path towards the solution of the problem of environmental crisis through the theological discipline of ecclesiology. Using the Catholic Archdiocese of Lilongwe's understanding of Church as the Family of God, the book concludes that the application of the concept of Church as family of God, while bringing great social cohesion among the people, failed to extend to human relationships with the natural world, in fact It has broadened the human feeling of superiority over the natural environment. The book provides an ecclesiological complementarity which promotes a universal fraternity among people and the natural world ,and recommends an ecclesiological concept of Church as New Creation, Nova creatio. This would serve as a call for human beings to make a new ecological conversion, leading new lifestyles, change in their models of nature-worldviews, and change in the models of production and consumption.