Abstract
What at bottom is meant by calling the universe many or by calling it one?
Pragmatically interpreted, pluralism or the doctrine that it is many means only that the sundry parts of reality may be externally related. Everything you can think of, however vast or inclusive, has on the pluralistic view a genuinely "external" environment of some sort or amount. Things are "with" one another in many ways, but nothing includes everything, or dominates over everything. The word "and" trails along after every sentence. Something always escapes. "Ever not quite" has to be said of the best attempts made anywhere in the universe at attaining all-inclusiveness. The pluralistic world is thus more like a federal republic than like an empire or a kingdom. However much may be collected, however much may report itself as present at any effective centre of consciousness or action, something else is self-governed and absent and unreduced to unity.
Monism, on the other hand, insists that when you come down to reality as such, to the reality of realities, everything is present to everything else in one vast instantaneous co-implicated completeness -- nothing can in any sense, functional or substantial, be really absent from anything else, all things interpenetrate and telescope together in the great total conflux.