The sum of his argument is this: that as deaths, births, and marriages, and the oscillations of the weather, irregular as they seem to be in themselves, are nevertheless reduceable upon the great scale to certain rules; so there may be discovered in the course of human history a steady and continuous, though slow development of certain great predispositions in human nature, and that although men neither act under the law of instinct, like brute animals, nor under the law of a preconcerted plan, like rational cosmopolites, the great current of human actions flows in a regular stream of tendency toward this development; individuals and nations, while pursuing their own peculiar and often contradictory purposes, following the guidance of a great natural purpose, and thus promoting a process which, even if they perceived it, they would little regard. What that process is he states in the following series of propositions:-
1st. All tendencies of any creature, to which it is predisposed by nature, are destined in the end to develop themselves perfectly and agreeably to their final purpose.
2nd. In man, as the sole rational creature upon earth, those tendencies which have the use of his reason for their object are destined to obtain their perfect development in the species only, and not in the individual.
3rd. It is the will of nature that man should owe to himself alone everything which transcends the mere mechanic constitution of his animal existence, and that he should be susceptible of no other happiness or perfection than what he has created for himself, instinct apart, through his own reason.
4th. The means which nature employs to bring about the development of all the tendencies she has laid in man, is the antagonism of those tendencies in the social state, no farther, however, than to that point at which this antagonism becomes the cause of social arrangements founded in law.
5th. The highest problem for the human species, to the solution of which it is irresistibly urged by natural impulses, is the establishment of a universal civil society, founded on the empire of political justice.
6th. This problem is, at the same time, the most difficult of all, and the one which is latest solved by man.
7th. The problem of the establishment of a perfect constitution of society depends upon the problem of a system of international relations, adjusted to law, and apart from this latter problem cannot be solved.