Vietnam is only thriving now because they toned down the communism and allowed American investment in the 90s. they had starvation levels of poverty, then the government freed up the economy and opened the country for foreign tourism and investment. Their economic success is proof of the failure of Marxism in relation to capitalism
I've been to Vietnam twice in the past 12 months alone and almost single person told me that they don't have bad blood from the war anymore because now their prospering from our investments and all of them want to learn English to deal with Americans
They started the transition in 1990 and