Quote Originally Posted by Diadoch
There is another good question - what if Alexander had lived 30 years longer?
He would have attacked China and west. Culteres would be more mixed and perhaps there would be faster progress due to the civilisation contact.

I believe that the fall of Rome would have lead to development of Helenes, Celts and of course Carthaginian culture. But prhaps there would be monoteism because India and Egypt had such ideas and successor kingdoms would have spread them.
Nah....Alexander would never attack India ever again. By the time he tries to invade India a second time, the Indians over there have been united under Chandragupta Maurya. Apart from being very numerous they also employ anti-Diadochi tactics involving greatly armoured elephants and mass iron bowmen.

The phalanx would simply be broken by the cataphract elephants and then showered to pieces by the mighty iron longbows of the Indian infantry.

Alexander would rationaly instead expand his empire to the west. He already made plans to invade Rome and Carthage, remember? At that time, Italy and Carthage is a lot weaker compared to the Mauryan Empire or even the Archaemid Persia. Subjugating them would be easy.

Then later he would either continue to conquering Iberia and Gaul, or amass a force of 5 million men and march again to India.