When the Reverend Mark Allison Matthews died in February 1940, thousands of mourners gathered at a Seattle church to pay their final respects. The Southern-born Presbyterian came to Seattle in 1902. He quickly established himself as a city leader and began building a congregation that was eventually among the nation's largest, with nearly 10,000 members. Throughout his career, he advocated Social Christianity, a blend of progressive reform and Christian values, as a blueprint for building a morally righteous community.

In telling Matthews's story, Dale Soden presents Matthews's...