I agree with you regarding the importance of thinking and acting locally, especially for the majority of people who don't realistically have the power and influ

I agree with you regarding the importance of thinking and acting locally, especially for the majority of people who don't realistically have the power and influence to make a difference outside of their locality. But it's a tremendously cynical and harmful to believe that "everyone is for themselves." It's just not true: there are millions if not billions of people who live much more for others than themselves. The supremacy of self-interest is not some foundational truth of social reality - it's an economic theory of human behavior which corporations and power hungry individuals want us to believe in because it props up the system of predatory capitalism that enriches them at the cost of the public good.