SLOTERDIJK · NOTES · LINKS · GRAPHREADING FRAGMENTS, IN THE ORDER THEY APPEAR
Peter Sloterdijk's Spheres trilogy has three volumes: Bubbles (Volume I), Globes (Volume II), and Foams (Volume III). (Wikipedia)
Very roughly:
The core idea: human beings do not simply exist "in space." We produce and inhabit spheres — relational, symbolic, architectural, psychological, political. That is why Sloterdijk is useful for architecture, interiors, domesticity, atmosphere, coexistence, and media theory. (sydneyreviewofbooks.com)

Spheres I — Microspherology
Spheres II — Macrospherology
Spheres III — Plural Spherology
Enlightened false consciousness
On anthropotechnics

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WORLD POPULATION · YEAR 0–2025 · 50-YEAR STEPS · SOURCES: BIRABEN, McEVEDY & JONES, UN POPULATION DIVISION
SPHERE: LIVED · EXISTENCE · CONTAINMENT · INSIDE/OUTSIDE — GESTALT: SEEN · PERCEPTION · PATTERN · FIGURE/GROUND