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550 NBW BOOKS. and regresdTe lawa M. de Greef endeavours to show what the conditions are which produce social advancement or decay. Social decay passes through (he same stages as mental decay. What the mind acquires last it loses first. It is the same with society. When a society begins to degenerate the decline first becomes visible in it* most complex structures, that is to say, in those structure* which are oi most recent growth and are most dependent npon the harmonious co-operation of adoi:10.1093/mind/ii.8.550 fatcat:veuhnikd3zgbjmgtmrmeuqywlq