Gedrosia on his way back from India.

Increase in population reduced hunting animals. For example only 50 hunting groups started their life in Gedrosia (Baluchistan province of Pakistan) at Mehrgarh in 8000 BC. Farming and hunting went side by side initially.

Alexander was angered by his army's refusal to help him conquer India because they had been fighting for ten years and wanted to take their loot home and enjoy it. He took them home through the Gedrosian Desert as payback, and a combination of little food and water and attacks by the local tribes took a heavy toll.

The oldest cultures before 3500 B.C. had limited population and they copied animals giving calls using sounds. There were roughly 50 hunting groups in Mehrgarh Gedrosia Indus Valley Kot Digi culture in South Asia 7000 B.C. culture. In oldest stone age culture of Samma Soan Valley in South Asia 0.5 million years old , we were using sounds of drum 200 year ago for communication. Simlar system existed in ancient cultures before evolution of pictorials

Alexander wanted to take India, which he thought was the end of the world in the east, and then had plans to go back west and conquer Western Europe, which he thought was the end of the world in the west - to be master of the whole world, he thought.

But his army had been on the march and fighting for ten years, had had enough and wanted to take their loot and go home.

The turn back in the Punjab ended this dream. He had no option after his attempts to coerce his army failed. He spitefully marched them back to Babylon through the Gedrosia desert where many of them perished. His planned turn to the western conquest was frustrated by his early death.