1. Them being for the sake of their economy, religion and glory.
2.They wanted to improve their economy for instance by acquiring more spices, gold, and better and faster trading routes.
During harappan civilisation people used to pray to an incarnation of siva lord pashupathi.they also prayed to different natural features like rivers etc..it was under the aryans that hinduism flourished in india
The Flavian ampitheater known also as the colloseum was built in 75 A.D. And was in Pompei
The International Space Station serves many purposes, but perhaps the greatest is to foster cooperation and exploration between various countries in space.
The answer to your question is Marxism-Leninism