Whatever the Islamic State hopes ultimately to achieve by its current onslaught on all and sundry in the Middle East, Philip II of Macedon, father of Alexander the Great, would certainly understand why it has been successful (so far); but Hannibal, who came within an ace of conquering Italy, might offer a word of warning.
In the ancient world, conquest of territory was the route to enrichment: other people’s resources became yours to use as you wished.

Disagree with half of it, enjoy reading all of it
TRY A MONTH FREE
Our magazine articles are for subscribers only. Try a month of Britain’s best writing, absolutely free.
Already a subscriber? Log in
Comments
Join the debate, free for a month
Be part of the conversation with other Spectator readers by getting your first month free.
UNLOCK ACCESS Try a month freeAlready a subscriber? Log in