truth. i believe what you are referring to is called "mutual aid". it's where a group of collective, usually family units, choose to behave like an actual "community", share resources when they can and actively participate in each other's lives.
rather than say, a group of singular, usually family units, that simple live close to one another, and share resources and/or interact with each other, very little to none at all.
i am also confused as to why people are threatened by this line of thought, or choose to view it as a "radical" concept.