Well he factually didn&#x27;t even from the perspective of &#x27;his known world&#x27;, Alexander both turned back from on campaign, and had planned another campaign he didn&#x27;t live to initiate.<p>But regardless it strikes me as a pretty ridiculous claim to make, (especially today) when an estimated 70% of the world population lived in places (they obviously know) that weren&#x27;t conquered by Alexander. After all there is no &#x27;the&#x27; known world. You can find many millions of people who have not a clue of the world beyond a few miles away and you&#x27;ll thereby find many different people who each rule their known world.