A book and study guide to understanding how Episcopal Church and churches in the Anglican Communion may stay together in the midst of division over same-sex marriage.

This study is the first comprehensive history of the impact of the modern missionary movement on the understanding of and work toward Christian unity. It tells stories from all branches of the church: Roman Catholic, Orthodox, and Protestant in its many types (conciliar, evangelical, Pentecostal, and independent). Part 1, "Historical," highlights the contribution of modern missions to Christian unity, from William Carey and his antecedents and peers to present-day missions. Part 2, "Ten Models of Unity," takes an inductive approach to history, asking not "how should Christians cooperate?" but "how has the missionary movement helped Christians to work together at the local, national, regional, and global level?" Part 3, "Wider Ecumenism," broadens the evidence to include how the missions movement has helped not only institutional churches but also broader society to have concern for the unity of the entire human family. Included here is the story of how the Protestant missionary movement influenced the forming of the United Nations as well as the drafting of the Universal Declaration of Human Rights. The study also covers the movement's impact on Christian attitudes toward, and relations with, persons of other faiths. Mission and Unity is the standard reference work in the field for persons studying modern history, modern church history, missions, and ecumenics.

The concept of missionary baptism is based on the household baptism of converts and their families described in the New Testament. This is most commonly experienced today in missionary situations, when entire families become Christians. Building on the work of nineteenth-century Scottish theologian William Cunningham, this study explores some implications for the connection between believers’ baptism, infant baptism, baby dedication, and Christian unity, particularly among evangelicals.

Christians cannot remain indifferent to the divisions in the Church today. In this study guide companion, Chan draws on the gospel infused message of Until Unity to remind readers that Church unity is not optional. This study guide includes: Deeper exploration of every chapter in Until Unity Free original videos with Francis Chan Tips for leading and participating in a small group Scripture passages and reflection questions Prompts for group and individual prayer Chan’s emphasis on worship and praise, along with his passionate teaching, make this guide a unique and life-changing exploration of why unity is not just God’s wish for His Church—it’s His command.

The ecumenical movement of the 20th century was a quest for unity born of a missionary concern for the world. Thus, from the beginning of present-day ecumenism, mission has been inextricably linked with unity. This volume explores the themes of unity, mission, and their relationship. Seventeen Roman Catholic and Protestant scholars offer essays in honour of George Vandervelde, a leading evangelical ecumenist from the Reformed tradition.

“I pray also for those who will believe in me through their message, that all of them may be one, Father, just as you are in me and I am in you.”Too often, these words of Jesus from John 17:20-21 seem like an unreachable ideal. But in Your Church Is Too Small, John Armstrong shows that Jesus’ vision of Christian unity is for all God’s people across social, cultural, racial, and denominational lines.“With attention to his own pilgrimage and growth in ecclesial awareness, John Armstrong explores here the evangelical heart and ecumenical breadth of churchly Christianity. I am encouraged by his explorations and commend this study to all believers who pray and labor for the unity for which our Savior prayed.” – Timothy George, senior editor, Christianity Today.“Dr. Armstrong’s irenic approach should make it easy for Christians—whether Catholic, Orthodox, or Protestant—to engage the challenging thesis of the book, while recognizing that there remain points of doctrine between them which will require further clarification. Anyone concerned about either evangelism or Christian unity should read this book, and take seriously its call for both mission and ecumenism.” – Fr. Thomas A. Baima, Provost, University of Saint Mary of the LakeJohn Armstrong is one of those Evangelical theologians—may their tribe increase and the valley abound with their tents—who know that full obedience to Christ embraces the historical transmission through which we know him. This book refuses to scale down the bearer of that tradition—the historical church, that is—or reduce the authority of its voice. – Fr. Patrick Henry Reardon, senior editor, Touchstone “It's a must for anyone who has grown weary with Christian divisiveness and schism and longs to discover ways of strengthening the bonds that unite us in the Spirit of Christ.”– Chuck Colson

This book reviews important missiological developments in ecumenical, evangelical, Roman Catholic and Eastern Orthodox circles between 1961 and 1975. Its central focus is on the essential relationship between unity and mission, but it also deals with other important missiological themes which dominated this era.