"a collection into one mass or aggregate," 1610s, from Latin congeries "heap, pile, collected mass," from congerere "to bring together, pile up," from assimilated form of com "with, together" (see con-) + gerere "to carry, perform" (see gest). False singular congery is attested by 1866.
Man should have some sense of responsibility to the human congeries. As a matter of observation, very few men have any such sense. No social order can exist very long unless a few, at least a few, men have such a sense. [Ezra Pound, "ABC of Economics," 1933]