by　human　demand。　And　the　inequality　of　soils　occasions；　even　at
  an　early　period　of　society　a　comparative　scarcity　of　the　best
  lands；　and　so　far　is　undoubtedly　one　of　the　causes　of　rent
  properly　so　called。　On　this　account；　perhaps；　the　term　partial
  monopoly　might　be　fairly　applicable。　But　the　scarcity　of　land；
  thus　implied；　is　by　no　means　alone　sufficient　to　produce　the
  effects　observed。　And　a　more　accurate　investigation　of　the
  subject　will　show　us　how　essentially　different　the　high　price　of
  raw　produce　is；　both　in　its　nature　and　origin；　and　the　laws　by
  which　it　is　governed；　from　the　high　price　of　a　common　monopoly。
  The　causes　of　the　high　price　of　raw　produce　may　be　stated　to
  be　three。
  First；　and　mainly；　that　quality　of　the　earth；　by　which　it　can
  be　made　to　yield　a　greater　portion　of　the　necessaries　of　life
  than　is　required　for　the　maintenance　of　the　persons　employed　on
  the　land。
  Secondly；　that　quality　peculiar　to　the　necessaries　of　life　of
  being　able　to　create　their　own　demand；　or　to　raise　up　a　number　of
  demanders　in　proportion　to　the　quantity　of　necessaries　produced。
  And；　thirdly；　the　comparative　scarcity　of　the　most　fertile
  land。
  The　qualities　of　the　soil　and　of　its　products；　here　noticed
  as　the　primary　causes　of　the　high　price　of　raw　produce；　are　the
  gifts　of　nature　to　man。　They　are　quite　unconnected　with　monopoly；
  and　yet　are　so　absolutely　essential　to　the　existence　of　rent；
  that　without　them；　no　degree　of　scarcity　or　monopoly　could　have
  occasioned　that　excess　of　the　price　of　raw　produce；　above　the
  cost　of　production；　which　shows　itself　in　this　form。
  If；　for　instance；　the　soil　of　the　earth　had　been　such；　that；
  however　well　directed　might　have　been　the　industry　of　man；　he
  could　not　have　produced　from　it　more　than　was　barely　sufficient
  to　maintain　those；　whose　labour　and　attention　were　necessary　to
  its　products；　though；　in　this　case；　food　and　raw　materials　would
  have　been　evidently　scarcer　than　at　present；　and　the　land　might
  have　been；　in　the　same　manner；　monopolized　by　particular　owners；
  vet　it　is　quite　clear；　that　neither　rent；　nor　any　essential
  surplus　produce　of　the　land　in　the　form　of　high　profits；　could
  have　existed。
  It　is　equally　clear；　that　if　the　necessaries　of　life　the　most
  important　products　of　land　…　had　not　the　property　of　creating　an
  increase　of　demand　proportioned　to　their　increased　quantity；　such
  increased　quantity　would　occasion　a　fall　in　their　exchangeable
  value。　However　abundant　might　be　the　produce　of　a　country；　its
  population　might　remain　stationary　And　this　abundance；　without　a
  proportionate　demand；　and　with　a　very　high　corn　price　of　labour；
  which　would　naturally　take　place　under　these　circumstances；　might
  reduce　the　price　of　raw　produce；　like　the　price　of　manufactures；
  to　the　cost　of　production。
  It　has　been　sometimes　argued；　that　it　is　mistaking　the
  principle　of　population；　to　imagine；　that　the　increase　of　food；
  or　of　raw　produce　alone；　can　occasion　a　proportionate　increase　of
  population。　This　is　no　doubt　true；　but　it　must　be　allowed；　as　has
  been　justly　observed　by　Adam　Smith；　that　'when　food　is　provided；
  it　is　comparatively　easy　to　find　the　necessary　clothing　and
  lodging。；　And　it　should　always　be　recollected；　that　land　does　not
  produce　one　commodity　alone；　but　in　addition　to　that　most
  indispensable　of　all　commodities　…　food　…　it　produces　also　the
  materials　for　the　other　necessaries　of　life；　and　the　labour
  required　to　work　up　these　materials　is　of　course　never　excluded
  from　the　consideration。（6*）
  It　is；　therefore；　strictly　true；　that　land　produces　the
  necessaries　of　life；　produces　food；　materials；　and　labour；
  produces　the　means　by　which；　and　by　which　alone；　an　increase　of
  people　may　be　brought　into　being；　and　supported。　In　this　respect
  it　is　fundamentally　different　from　every　other　kind　of　machine
  known　to　man；　and　it　is　natural　to　suppose；　that　it　should　be
  attended　with　some　peculiar　effects。
  If　the　cotton　machinery；　in　this　country；　were　to　go　on
  increasing　at　its　present　rate；　or　even　much　faster；　but　instead
  of　producing　one　particular　sort　of　substance　which　may　be　used
  for　some　parts　of　dress　and　furniture；　etc。　had　the　qualities　of
  land；　and　could　yield　what；　with　the　assistance　of　a　little
  labour；　economy；　and　skill；　could　furnish　food；　clothing；　and
  lodging；　in　such　proportions　as　to　create　an　increase　of
  population　equal　to　the　increased　supply　of　these　necessaries；
  the　demand　for　the　products　of　such　improved　machinery　would
  continue　in　excess　above　the　cost　of　production；　and　this　excess
  would　no　longer　exclusively　belong　to　the　machinery　of　the
  land。（7*）
  There　is　a　radical　difference　in　the　cause　of　a　demand　for
  those　objects　which　are　strictly　necessary　to　the　support　of
  human　life；　and　a　demand　for　all　other　commodities。　In　all　other
  commodities　the　demand　is　exterior　to；　and　independent　of；　the
  production　itself；　and　in　the　case　of　a　monopoly；　whether　natural
  or　artificial；　the　excess　of　price　is　in　proportion　to　the
  smallness　of　the　supply　compared　with　the　demand；　while　this
  demand　is　comparatively　unlimited。　In　the　case　of　strict
  necessaries；　the　existence　and　increase　of　the　demand；　or　of　the
  number　of　demanders；　must　depend　upon　the　existence　and　increase
  of　these　necessaries　themselves；　and　the　excess　of　their　price
  above　the　cost　of　their　production　must　depend　upon；　and　is
  permanently　limited　by；　the　excess　of　their　quantity　above　the
  quantity　necessary　to　maintain　the　labour　required　to　produce
  them；　without　which　excess　of　quantity　no　demand　could　have
  existed；　according　to　the　laws　of　nature；　for　more　than　was
  necessary　to　support　the　producers。
  It　has　been　stated；　in　the　new　edition　of　the　Wealth　of
  nations；　that　the　cause　of　the　high　price　of　raw　produce　is；　that
  such　price　is　required　to　proportion　the　consumption　to　the
  supply。（8*）　This　is　also　true；　but　it　affords　no　solution　of　the
  point　in　question。　We　still　want　to　know　why　the　consumption　and
  supply　are　such　as　to　make　the　price　so　greatly　exceed　the　cost
  of　production；　and　the　main　cause　is　evidently　the　fertility　of
  the　earth　in　producing　the　necessaries　of　life。　Diminish　this
  plenty；　diminish　the　fertility　of　the　soil；　and　the　excess　will
  diminish；　diminish　it　still　further；　and　it　will　disappear。　The
  cause　of　the　high　price　of　the　necessaries　of　life　above　the　cost
  of　production；　is　to　be　found　in　their　abundance；　rather　than
  their　scarcity；　and　is　not　only　essentially　different　from　the
  high　price　occasioned　by　artificial　monopolies；　but　from　the　high
  price　of　those　peculiar　products　of　the　earth；　not　connected　with
  food；　which　may　be　called　natural　and　necessary　monopolies。
  The　produce　of　certain　vineyards　in　France；　which；　from　the
  peculiarity　of　their　soil　and　situation；　exclusively　yield　wine
  of　a　certain　flavour；　is　sold　of　course　at　a　price　very　far
  exceeding　the　cost　of　production。　And　this　is　owing　to　the
  greatness　of　the　competition　for　such　wine；　compared　with　the
  scantiness　of　its　supply；　which　confines　the　use　of　it　to　so
  small　a　number　of　persons；　that　they　are　able；　and　rather　than　go
  without　it；　willing；　to　give　an　excessively　high　price。　But　if
  the　fertility　of　these　lands　were　increased；　so　as　very
  considerably　to　increase　the　produce；　this　produce　might　so　fall
  in　value　as　to　diminish　most　essentially　the　excess　of　its　price
  above　the　cost　of　production。　While；　on　the　other　hand；　if　the
  vineyards　were　to　become　less　productive；　this　excess　might
  increase　to　almost　any　extent。
  The　obvious　cause　of　these　effects　is；　that　in　all
  monopolies；　properly　so　called；　whether　natural　or　artificial；
  the　demand　is　exterior　to；　and　independent　of；　the　production
  itself。　The　number　of　persons　who　might　have　a　taste　for　scarce
  wines；　and　would　be　desirous　of　entering　into　a　competition　for
  the　purchase　of　them；　might　increase　almost　indefinitely；　while
  the　produce　itself　was　decreasing；　and　its　price；　therefore；
  would　have　no　other　limit　than　the　numbers；　powers；　and　caprices；
  of　the　competitors　for　it。
  In　the　production　of　the　necessaries　of　life；　on　the
  contrary；　the　demand　is　dependent　upon　the　produce　itself；　and
  the　effects　are；　in　consequence；　widely　different。　In　this　case；
  it　is　physically　impossible　that　the　number　of　demanders　should
  increase；　while　the　quantity　of　produce　diminishes；　as　the
  demanders　only　exist　by　means　of　this　produce。　The　fertility　of
  soil；　and　consequent　abundance　of　produce　from　a　certain　quantity
  of　land；　which；　in　the　former　case；　diminished　the　excess　of
  price　above　the　cost　of　production；　is；　in　the　present　case；　the
  specific　cause　of　such　excess；　and　the　diminished　fertility；
  which　in　the　former　case　might　increase　the　price　to　almost　any
  excess　above　the　cost　of　production；　may　be　safely　asserted　to　be
  the　sole　cause　which　could　permanently　maintain　the　necessaries
  of　life　at　a　price　not