With the greatest of respect - that's such old idealist nonsense.
Conformity isn't a solution, people never react well to it cos fundamentally it's always oppressive.
Humans have always without fail had far more success by increasing lawful opportunities.
Whatever it is you feel is the big bad or problem right now leading to tragedy of the commons the solution is going to be looking beyond the symptoms, drilling down to the causes and then figuring out how you treat that in a way that increases opportunity.
Then people will get on board, conform even of their own accord. Not through altruism of "what's in it for us" but through "what's in it for me". Because we don't really change, "what's in it for me" is core to human survival in a way that "what's in it for us" has never been, even though it's an "us" society was itself in it for "me". It doesn't help that when people do go on about "us" inevitably sooner or later it ends up being "us" in the sentence "us and them" because that "us" is abstract and always will be, it's never "me" and "you".