What was the greatest threat to the stability of American society in the 1930’s?

greatest threat-the great depression.

Socialist programs are what kept people from starving and living

on the street. But turning away from democracy? No

One major difference between nations that had revolutions leading to an attempt to follow Marxist political theory was a pronounced vertical stratification of their society. All this term really means is there was drastic gulf between the 'haves' and the 'have-nots'. In supporting a revolution, the 'have-nots' who well out-numbered the 'haves' saw themselves as having nothing and therefore having nothing to lose.

Certain folk in North America did feel threatened by 'Communist Revolutions' and the fact Roosevelt in the United States; soon to be followed by R.B. Bennett and Mackenzie King's regimes in Canada; introduced programmes to put people back to work building infrastructure in their respective countries helped to contain any radical factions from building up too much steam - by gaining numbers of followers. There was also the debacle of the Winnipeg Strike in 1919, which had already caused a 'Red Scare' throughout North America (actually more-so in the United States than Canada, even though Winnipeg is located in Canada). Many shrill radical voices had already been silenced by that experience.

There was not the same gulf between the 'haves' and the 'have-nots' in North America. Many of those who were previously 'haves' in North America were hit harder than the 'have-nots' because they had more to lose and further to fall.