Politics is smaller than a society.

Politics doesn't change society.Society changes politics. Social fluctuate causes politics. If a common people died of cancer,Newspaper wouldn't carry an item about it. To die of cancer is a common thing. But society stands on a common sense,such as "lebenswelt(lifeworld)".and Nobody talk about them one by one.
Many facts in the world formed a self-evidential preconditions. Politics get away from them.
On the contrary, a political incident indicates some social common sense fluctuate.
Serious political crisis sometime indicates the collapse of social fact,such as employment or marriage system.