Today, approximately one-fourth of the world’s population includes 1,620 million persons who are part of the expanding Islamic Ummah. Muslims are found in large numbers in all regions of the world but are concentrated in Africa, Asia, the Middle East and selected successor states to the former...

Horrific acts of terrorism have emerged as defining features of Islamic–Western relations throughout much of this still young century. Arising from decades, indeed centuries, of mutual distrust contemporary patterns of radicalized Islamic terrorism toward the West are rooted in their shared...