Phenomena of a man alone on a desert island can be explained in terms of "mass psychology" - inasmuch as the mind of no man is a unit, but is a community of mental states that influence one another.

If "mass psychology" applies definitely to one occurrence, it must, even though almost imperceptibly, apply to all occurrences.

I felt alone out there, like I was on a desert island. I felt like Gilligan.

All biologic phenomena act to adjust: there are no biologic actions other than adjustments. Adjustment is another name for Equilibrium. Equilibrium is the Universal, or that which has nothing external to derange it.

Rick Owens is my desert island designer. I could live in his clothes alone, and I collect Ossie Clark.

A child raised on a desert island, alone, without social interaction, without language, and thus lacking empathy, is still a sentient being.