(Myxomycota, specifically the cellular/amoeboid/communal slime mold;  typified by the genus  Dictyostelium )
Slime molds spend most of their life as single, amoeba-like, single-celled  organisms. They are present in millions and billions on the floor of forests and other areas. Each such amoeba has its own individual "life style"; oozing now in this, now in that direction and consuming bacteria. This is the liberal, free-market, or anarchistic phase.

But at an unseen signal (from the "Zeitgeist," perhaps), the individual amoebas stop their foraging and begin gathering together. They form streams of cells, which in turn join other streams, eventually creating miniature rivers of cells. These flow together, coalescing into a worm-like mass called a "slug," that may reach a few millimeters in size. This is the "collective" or "totalitarian" phase. The mass of once-solitary amoebas now begin to behave as ONE, all apparently subservient to a "collective will" of the slug, which slithers along the ground on a track of self-generated slime. After wandering in this way for some time, the slug stops and metamorphosizes once more. It stands on end to create a tower-like structure, a slender stalk supporting a mass of spores on top. Eventually the spore case ruptures, releasing individual spores to the wind. When they hit the ground, they germinate, creating, once again, single-celled amoeba. And the "yin-yang" life cycle of the slime mold begins anew.

In contrast, the so-called acellular, plasmodial or "true" slime molds (myxomycetes) exist mostly as giant, creeping multinucleate amoeboid masses (plasmodia) which can spread over areas as large as a meter in diameter.  In nature they are found on decaying logs, dead leaves, etc in cool, moist and shady areas. These, however, also have an individualistic-anarchistic phase of sprouted "clones" of genetically similar amoeboid cells, that subsequently swarm together and fuse into a giant new plasmodial blob.

A wonder of Nature, but not exactly what you would call human!