The hardships for Moving west were that you could run out of food or supplies. But there motivations were high becuase they needed more land becuase the population was growing and there wasn't enough room for everybody in their towns.
Aryans came to India, with the British, in the 19th century. Many British Indologists and a German one, created the Aryan invasion theory, by giving racist meaning to a Sanskrit word 'arya' which meant nobleman, at a time when race was used to justify colonialism. So, Aryans entered India, not by land, not by sea, nor did they land from the sky. They came through the textbook route.
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No person shall be deprived of life, property, without due of process of law.
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