The text examines the fundamental distinction between a mere heap (aggregate) and a community of beings. In an aggregate, the boundaries and belonging of elements are determined solely by an external observer. In contrast, a community requires consideration of the internal side and the unity of the aggregated beings, which interact through forms of "being-together" or, in the case of living entities, "living-together." The author explores whether fundamental physical forces, such as gravity or electromagnetism, can be viewed as low-level forms of co-activity or mutual reactivity. The central hypothesis suggests that perfect aggregation may not be possible within a single universe, as entities are always interconnected to some degree and react to one another. This philosophical reflection challenges the concept of purely random clusters that lack any form of internal coherence, suggesting that every collection of beings involves some level of co-reactivity, thereby blurring the line between a simple object and a complex community of interacting entities.