I tend to be of the opiion that the ountries least likely to go read are those firmly in the anglosphere, includig the United States (but not India).
Agreed, except I would say that the nations least likely to go go communist include the Anglosphere AND the Islamic world.
I also find it difficult (though not impossible) to see nations which are viewed as 'firmly Western', ie all of Western Europe among others, going communist, in a long-term way.
I'm not sure if others would agree, but I remember reading somewhere else, some person (I think a sociologist or a political scientist, but can't remember exactly) saying that one (among many) reasons that no Western nation ever voluntarily went communist*, was because the individualistic values that underpin Western culture are so strong that communism, at least of the Marxist-Leninist variety, will never gain a strong foothold.
Also, any nation where the populace is are STRONG believers in an Abrahamic religion (ie USA, Islamic world, NOT Europe) is also almost impossible to go communist, because it is very easy for anti-communists to cultivate revulsion towards 'godless, atheistic communism'.
*Ie, not including the Warsaw Pact nations, that were under Soviet influence and didnt go 'voluntarily' communist.