Right now, on your individual body, there are countless communities living, procreating and going through their separate life cycles. There are bacteria, enzymes, skin cells, bone cells, hairs, blood, antibodies, etc. You do not think of them as SEPARATE ENTITIES, yet they function without your awareness, in their own world, with their own agenda. Yet without them you fail to exist. THEY ARE A PART OF YOU.
Similarly, we each are a part of a family, community, town, country, company, planet ( infinity). There is no part where 1 thing stops and the other starts. All of live is connected as one organism, each individual component having a distinct impact on the whole.

We have a responsibility to live for the good of the collective of all creation.
ONE FOR ALL; ALL FOR ONE!