History

The Crusades: 8 key ideas

by Thomas Asbridge

The core ideas of The Crusades, each in under a minute, written in our own words. Want the full depth? Get the book.

1. IDEA 1 OF 8

   A pope launched a holy war

   Asbridge describes how Pope Urban II, in a speech at Clermont in 1095, called on Western Christians to fight to recover Jerusalem.

   He promised spiritual rewards to those who joined, and thousands responded.

2. IDEA 2 OF 8

   The First Crusade took Jerusalem

   Asbridge describes the long, difficult journey of the First Crusade and the capture of Jerusalem in 1099.

   The conquest was followed by a massacre of many inhabitants. Asbridge shows that this success was won at a very heavy human cost.

3. IDEA 3 OF 8

   Crusaders built states in the Levant

   After the First Crusade, Europeans established crusader states along the eastern Mediterranean.

   They had to defend these territories against neighbouring Muslim powers. Keeping these small states safe was a constant struggle, which meant they depended on help from Europe.

4. IDEA 4 OF 8

   Muslims revived jihad

   Asbridge describes how Muslim leaders gradually revived the idea of holy war to resist the crusaders.

   Leaders like Nur al-Din united forces. Asbridge presents this growing unity as a key reason the crusaders later began to lose ground.

5. IDEA 5 OF 8

   Saladin recaptured Jerusalem

   Asbridge describes how Saladin defeated the crusaders at the Battle of Hattin in 1187 and took Jerusalem.

   He became a hero to Muslims. Asbridge shows that his victory changed the balance of power in the region and shocked Europe.

6. IDEA 6 OF 8

   Richard fought Saladin

   Asbridge describes the Third Crusade, led by Richard the Lionheart of England.

   Richard won battles but could not retake Jerusalem. Asbridge shows that the two leaders also developed a wary respect for each other.

7. IDEA 7 OF 8

   Crusaders sacked Constantinople

   Asbridge describes how the Fourth Crusade turned against Constantinople, a Christian city, in 1204.

   This deepened divisions between Eastern and Western Christians. Asbridge suggests this betrayal left a bitterness that lasted for centuries.

8. IDEA 8 OF 8

   The Crusades are still remembered

   Asbridge discusses how the Crusades are remembered in both the West and the Muslim world.

   Their memory still shapes perceptions today. Different groups choose different stories from the past, so the same events can mean very different things.