Ideologies Followup and Why Western States Terrorize their Populations

Do Western governments intentionally destabilize the countries they rule? Why would they do this? Social unrest and economic disruption directly injures their cattle (us) and needlessly burns up wealth.

My argument is that they have to do this to implement social engineering. My evidence is the 1) Great Depression, which brought in the New Deal, 2) Operation Northwoods shows that the American MIC is totally willing to stage false flags for political purposes, and 3) Operation GLADIO shows that America has often lead other countries to set up state-funded domestic terrorist squads for political purposes.