"Everyone who believes in God at all believes that He knows what you and I are going to do tomorrow."
-C. S. Lewis

This understanding of God's foreknowledge has united the church for twenty centuries. But advocates of "open theism" are presenting a different vision of God and a different view of the future.

The rise of open theism within evangelicalism has raised a host of questions. Was classical theism decisively tainted by Greek philosophy? How should we understand passages that tell us that God repents? Are essentials of biblical Christianity-like the inerrancy of...