I’ve mentioned the brilliant biography of Dietrich Bonhoeffer written by Eric Mataxas before. It’s an excellent book that I think you should read if possible.
Mataxas carried on the legacy of Wilberforce and Bonhoeffer last week in his speech at the National Prayer Breakfast. You can hear what he had to say by watching the video here. Fast forward to the 35 minute mark. As a bonus, President Obama was allowed to say a few words afterwards as well.