Glover's term for the institutional climate of premises, norms, and background assumptions — the fishbowl water — that determines which moral resources are exercised and which are suppressed within any working environment.
Institutions, Glover argued, do not merely contain moral agents who act well or poorly. Institutions produce the conditions under which moral action becomes possible or impossible. The production operates through atmosphere — the invisible medium of assumptions that shapes what can be perceived, what can be felt, what can be said. The camp had an atmosphere. The bureaucracy had an atmosphere. The party meeting had an atmosphere. Each atmosphere made certain values operative and others inoperative — not by argument or decree but by the patient accumulation of norms that determined which questions could be asked and which were unthinkable. The Silicon Valley AI lab has an atmosphere too. Its composition is specific: the moral neutrality of tools, the inherent goodness of efficiency, the sovereignty of user choice. These are not conclusions. They are premises — the water the fish swim in — and their invisibility is what makes them load-bearing.