Almost a hundred years ago, successful business leader Robert A. Laidlaw wrote a small book, The Reason Why, to explain in a thoughtful and accessible way why he was convinced that faith in God makes sense. He printed the book primarily for his large staff of employees, but it quickly took on a life of its own - and over time fifty million copies were printed of his powerful and winsome work.

Mark Mittelberg has updated and explanded Laidlaw's discussion of this perennial topic for the twenty-first century. In addition, he highlights some of the more recent evidence relating to these themes.