The phrase, "Common Good" needs context to determine a cogent answer. What is "Good" and whose Good are we referring to here?
The Common Good can be construed at the Majority, as opposed to ALL the people. There is no way to satisfy the compass settings of all the people, even on singular purposes, much less in toto.
So the ship of politics is suppose to set the course chartered by the majority on board. However, in the US the minority have gotten into the wheelhouse and are steering the ship toward the rocky shores of beaching the ship so that it cannot move any further.
The majority is the most that can be expected to be the essence of We The People. Over the centuries that consistency and texture of the People can and will change, but the concept of majority needs to be the rudder.
In the last several decades the minorities, as opposed to the majority, and not the makeup of the people have slowly but surely changed the politics to their advantage. As the politics are a zero sum beast, this means that the majority loses for every gain made by the minority.
If the minority had such great ideas, then it would have become the majority. But alas, this has not happened, and the result has been the creation of an ever widening Abyss.
This year we are looking at politics from well inside this Abyss.