Theessenceofthetheoryisthatrent，beingthepricepaidbythecultivatortotheowneroflandfortheuseofitsproductive
powers，isequaltotheexcessoithepriceoftheproduceotthelandoverthecostofproductiononthatland。Withthe
increaseofpopulation，andthereforeofdemandforfood，inferiorsoilswillbetakenintocultivation;andthepriceofthe
entiresupplynecessaryforthecommunitywillberegulatedbythecostofproductionofthatportionofthesupplywhichis
producedatthegreatestexpense。Butforthelandwhichwillbarelyrepaythecostofcultivationnorentwillbepaid。Hence