 Where Kant would argue that reason can only be used properly by goodwill, Mill would say that the only way to universally create fair laws and systems would be to step back to the consequences, whereby Kant's ethical theories become based around the ultimate good—utility.By this logic the only valid way to discern what is proper reason would be to view the consequences of any action and weigh the good and the bad, even if on the surface, the ethical reasoning seems to indicate a different train of thought.Mill's major contribution to utilitarianism is his argument for the qualitative separation of pleasures.