Answer:
Research evidence suggests that happiness depends more on -internal- factors than on -external- factors.
I think the prime reason why a government would be unstable is when the government's actions and powers do not match with the needs of the populace. Those needs can be many different things and can be different things at different times: food, shelter, infrastructure, protection from bad neighbors, protection from invaders... the list would take me a day and a half.
If you look back at the collapse of the USSR, there was a misalignment between the people's needs and what the government gave. If you look at the current USA, the least stable places are where government is deliberately creating friction with the citizens, and close to that are the places where government is not creating a good framework for people's needs to be met.
Corruption can be a symptom of this mismatch, but in and of itself is not the prime reason for instability. Go look at various nation-states throughout history. The unstable governments were and are the ones where a large segment of people felt the government wasn't doing anything to help them with their needs.
Jimmy carter is the president responsible for starting the in-house pollster. Every president since him has done the same. <span />
The answer to this is Martin Luther King JR
