Gratitude is on our minds as we celebrate Thanksgiving. Practicing thankfulness, we are looking back to an interview John conducted with Peter Leithart, president of the Theopolis Institute and author of "Gratitude: An Intellectual History."

How did Christianity change the West's understanding of gratitude? And how can we Christians in this age of profound ingratitude and entitlement reinvigorate the virtues of gratitude and thanksgiving in our own lives and in the culture around us?