In that respect men were measurable and comparable.

Politics and jurisprudence could therefore be made experimental sciences in exactly the same sense as physics or chemistry.

'The present work,' wrote Bentham, 'as well as any other work of mine that has been or will be published on the subject of legislation or any other branch of moral science, is an attempt to extend the experimental method of reasoning from the physical branch to the moral.'[28] [28] MS.

in University College, London, quoted by Halevy, _La Jeunesse de Bentham_, pp.

289-290.
Bentham's standard of 'pleasure and pain' constituted in many ways an important advance upon 'natural right.' It was in the first place founded upon a universally accepted fact; all men obviously do feel both pleasure and pain.