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Structure of the World System
A World Model Structure and Assumptions
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accumulation action actual agriculture alter appear assumed assumptions average become behavior billion birth rate capital investment Capital-investment cause Chapter consequences continue created crowding curve death rate decline defined depends described developed discard discussed dynamic effect environment equations equilibrium examine existing expect factors falling Figure food production food ratio forces fraction future gives greater grow growth higher human improve increase indicated industrialization influence initial land less limit LOGICAL FUNCTION loop lower material standard means mode MULTIPLIER DIMENSIONLESS natural resources natural-resource normal NREM occurs person physical policies pollution crisis pollution ratio POLR population possible present PRESENT ORIGINAL pressures probably processes raise rate normal reached reduced relationship remaining represents result rise sector shortage shown shows social systems space standard of living stop stress structure suppressed taken tion understand UNITS usage variable world system