The moment we base Morality on Evolution, we see that it must change with the stage of evolution reached, and that the duty—that which ought to be done—of the civilised and highly advanced man is not the same as the duty of the savage. “One set of duties for men in the K[r.][t.]a age, different ones in the Tre[t.][=a] and in the Dv[=a]para, and another in the Kali.” (Manusm[r.][t.]i, i, 85.) Different ages bring new duties. But if Morality be based on Evolution we can at once define what is “Right” and what is “Wrong”. That is Right which subserves Evolution; that is Wrong which antagonises it. Or in other words, for those of us who believe that God’s method for this world is the evolutionary: that is Right which co-operates with His Will; that is wrong which works against it. “Revelation” is an attempt to state this at any given time; “Intuition” is the result of successful attempts to do this; “Utility” is the application of observed results of happiness and misery which flow from obedience to this, or disregard thereof.
Evolution is the unfolding and manifestation of life-energies, the unfolding of the capacities of consciousness, the manifestation of these ever-increasing capacities in ever-improving and more plastic forms. The primary truth of Morality, as of Religion and of Science, is the Unity of Life. One Life ever unfolding in endless varieties of forms; the essence of all beings is the same, the inequalities are the marks of the stage of its unfoldment.
When we base Morality on Evolution, we cannot have, it is obvious, one cut and dry rule for all. Those who want cut and dry rules must go to their Scriptures for them, and even then, as the rules in the Scriptures are contradictory—both as between Scriptures and within any given Scripture—they must call in the help of Intuition and Utility in the making of their code, in their selective process. This selective process will be largely moulded by the public opinion of their country and age, emphasising some precepts and ignoring others, and the code will be the expression of the average morality of the time. If this clumsy and uncertain fashion of finding a rule of conduct does not suit us, we must be willing to exert our intelligence, to take a large view of the evolutionary process, and to deduce our moral precepts at any given stage by applying our reason to the scrutiny of this process at that stage. This scrutiny is a laborious one; but Truth is the prize of effort in the search therefor, it is not an unearned gift to the slothful and the careless.