Muslims were disproportionately involved in intergroup violence relative to their share of world population.

Evidence

Wherever one looks along the perimeter of Islam, Muslims have problems living peaceably with their neighbors. The question naturally rises as to whether this pattern of late-twentieth-century conflict between Muslim and non-Muslim groups is equally true of relations between groups from other civilizations. In fact, it is not. Muslims make up about one-fifth of the world’s population but in the 1990s they have been far more involved in intergroup violence than the people of any other civilization. The evidence is overwhelming. — Samuel P. Huntington, The Clash of Civilizations and the…, 709

Categorization

• XREF: This is the audacious empirical claim behind the whole ‘clash’ thesis — connects to the reader’s wider reading on civilizational identity and conflict.
• DEFINE: Establishes the book’s central measurable inference: conflict rates along Islam’s perimeter exceed those of other civilization boundaries.