_Ibid._, p. 28. If the Ricardian hypothesis is not true of individuals, it is still less true of Governments, as Cobden experienced. Footnote 507: _Ibid._, pp. 30, 31. Footnote 508: _Ibid._, p. 32: “Many of the questions both in morals and politics seem to be of the nature of the problems _de maximis et minimis_ in fluxions; in which there is always a point where a certain effect is the greatest, while on either side of this point it gradually diminishes.” Footnote 509: Cf. even _Observations_, pp. 5, 12, 13. Footnote 510: See below, chs. ii. and iii. Footnote 511: The expression of Grenville in a letter to Pitt, 1800. See Stanhope, _Life of Pitt_, ii. 371. Footnote 512: Unless perhaps Mr. Bagehot’s. Col. Thompson understood the theory of population only in its cruder form. In answer 337 of the _Catechism_ (1839) he meets the objection that free trade would only increase population by saying: “No man has a right to prevent us running a constant race with hunger if we can.” Footnote 513: _Grounds_, &c., p. 46 n. Footnote 514: _Ibid._, pp. 3, 11, 12, Footnote 515: _Ibid._, pp. 30, 33. Footnote 516: Ricardo, _Works_, p. 33[8?]5 (MacC.’s ed.). For remarks on this part of Malthus’ tract see _ibid._, p. 382. Footnote 517: _Grounds_, &c., p. 36 n. Cf. Ricardo, p. 390. Footnote 518: See above, p. 211. Footnote 519: _Pol. Econ._, ch. iii. sect. i. p. 134 (1820). Footnote 520: _Wealth of Nations_, I. xi., beginning. Footnote 521: He does not always prefix this qualification; but that he intended it appears clearly from the _Tract on Rent_, p. 3 n.: Not every land that yields food will yield rent. Cf. _Pol Econ._ (1820), p. 141. Footnote 522: Compare _Tract on Rent_, p. 16 n. Footnote 523: The title of the tract is, _An Inquiry into the Nature and Progress of Rent, and the Principles by which it is regulated_. It appears from a letter of Malthus to Sir John Sinclair on 31st Jan., 1815, that it was passing through the press in that month. Sinclair, _Correspondence_, i. 391 (1831). Footnote 524: As, he might have added, in education. Footnote 525: _Pol. Econ._ (1820), p. 142, but especially p. 187. Cf. _Tract on Rent_, pp. 8–12. Footnote 526: _Rent_, p. 10. Footnote 527: Cf. also below, p. 294. Footnote 528: _Wealth of Nations_, IV. ii. 307, 2; cf. IV. v. 240, 2. Footnote 529: _Essay on the Application of Capital to Land_, with observations showing the impolicy of any great restriction of the importation of corn, and that the bounty of 1688 did not lower the price of it. By a fellow of University College, Oxford. (London, 1815.) Page 2. Footnote 530: _W. of N._, II. iii. 148, 1. Footnote 531: _Essay_, 1st ed., p. 363. Footnote 532: _Tract on Rent_, p. 16; _Essay on Pop._ (7th ed.), p. 327. Cf. above. Footnote 533: