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progressinscienceandtheimprovementoflivingconditionshaveledtotherapidgrowthoftheworldpopulation.modernmedicine,forexample,hasmadeitpossibleforbabiestogrowuphealthilyandforpeopletolivelonger.withimprovedlivingconditions,particularlyinthecountryside,peopletendtohavelargerfamilies.asaresult,theworldpopulationhasincreasedsorapidlythatithasnowexceeded6billion.buttheovergrowthofpopulationpresentsathreattotheexistenceofhumansociety.alargepopulationdemandsagreatdealoffoodsupplyandshelterspace.however,limitedproductivityandscarceworldresourcescanhardlymeettheneedsoftheever-increasingpopulation.thus,inthelongrun,theovergrowthoftheworldpopulationwillonlyharmmankind.
toguaranteethesteadydevelopmentofhumansociety,mankindmustrealizetheconsequencesresultingfromfastpopulationgrowthandcarryoutafamilyplanningprogramme.onlybyadoptingeffectivemeasures,canhumansocietydevelopsteadilyandhaveabrightfuture.