What would the world have been like if the Lord Jesus Christ, His church, His people had never existed? And what difference has Christianity made for this world? Dr. Jeremiah Johnston, president of the Christian Thinkers Society and Associate Professor of Early Christianity at Houston Baptist University, joins me to talk about it and his book, "Unimaginable: What Our World Would Be Like Without Christianity." That and more on Tuesday's JANET MEFFERD TODAY.