The quality or state of being accumulative; the characteristic of tending to gather, build up, or increase over time.
From accumulative + '-ness' (suffix forming nouns of quality/state). A technical term used primarily in psychology, economics, and scientific discourse.
The accumulativeness of human nature—our tendency to collect and keep things—shaped civilization itself; hoarding behavior evolved because storing resources helped ancestors survive lean times, but it went into overdrive in consumer culture.
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