Last semester I taught a course on the historical and theological development of the church. Beginning with the resurrection, the course mapped out how the church grew out of Pentecost and the activity of the apostles, went through periodic persecutions until Constantine, and progressed into numerous traditions and denominations.
On the first day of class, students were split into groups and tasked with writing out a definition of the church. Many of the definitions addressed the various functions of the church, the universal and the local church, and Christ as the head of the church. As the course went along, these definitions were developed through an exegetical, historical, and theological study of the church. I enjoyed using various primary and secondary readings for the course, but if I were to do it all over again, I would definitely have Gerald Bray’s The Church as a required text.
Take Protestantism, drop it in the American context, and what do you get? A proliferation of schisms and denominations.
Protestantism broke off of the Roman Catholic Church in the sixteenth century and quickly formed different streams of Protestants after Martin Luther and Huldrych Zwingli failed to find agreement over the meaning of the Lord’s Supper. Fast forward to the early years of the United States when the young republic disestablished religion, and there you find Christian sects—and some not so Christian—forming even more rapidly.
Now in the twenty-first century, with the vast diversity of Protestant denominations, one wonders what unifies this colorful array of Christians? Anthony Chute, Christopher Morgan, and Robert Peterson suggest that denominationalism is not essentially at odds with evangelical unity, and in their book, Why We Belong: Evangelical Unity and Denominational Diversity (Crossway, 2013), they probe this question from several angles, pooling the insight of evangelicals in several denominations to offer a helpful foray into the tension of unity and diversity in the church today.