Answer:
because humans are inherently greedy and and self-centered.
they saw that many people became prosperous while they did not. they saw communism/socialism as a way to equalize everybody.
Explanation:
The third nation created on the Indian subcontinent is Bangladesh.
Bangladesh managed to get its independence in 1971, and formed a provisional government in April the same year in Mujibnagar. The government was in exile afterwards in Calcutta. The independence came after a war with Western Pakistan, and a a genocide over the population in Bangladesh.