No less clear is it that the transition from indifferent acts to acts which are good or bad is gradual. If a friend who is with me has explored the sea-shore, but has not seen the waterfall, the choice of one or other end is no longer ethically indifferent. And if, the waterfall being fixed on as our goal, the way over the moor is too long for his strength, while the shorter way through the wood is not, the choice of means is no longer ethically indifferent. Again, if a probable result of making the one excursion rather than the other, is that I shall not be back in time to keep an appointment, or if taking the longer route entails this risk while taking the shorter does not, the decision in favor of one or other end or means acquires in another way an ethical character; and if the appointment is one of some importance, or one of great importance, or one of life-and-death importance, to self or others, the ethical character becomes pronounced. These instances will sufficiently suggest the truth that conduct with which Morality is not concerned, passes into conduct which is moral or immoral, by small degrees and in countless ways. But the conduct that has to be conceived scientifically before we can scientifically conceive those modes of conduct which are the objects of ethical judgments, is a conduct immensely wider in range than that just indicated. Complete comprehension of conduct is not to be obtained by contemplating the conduct of human beings only; we have to regard this as a part of universal conduct--conduct as exhibited by all living creatures. For evidently this comes within our definition--acts adjusted to ends. The conduct of the higher animals as compared with that of man, and the conduct of the lower animals as compared with that of the higher, mainly differ in this, that the adjustments of acts to ends are relatively simple and relatively incomplete. And as in other cases, so in this case, we must interpret the more developed by the less developed. Just as, fully to understand the part of conduct which Ethics deals with, we must study human conduct as a whole; so, fully to understand human conduct as a whole, we must study it as a part of that larger whole constituted by the conduct of animate beings in general. Nor is even this whole conceived with the needful fullness, so long as we think only of the conduct at present displayed around us. We have to include in our conception the less-developed conduct out of which this has arisen in course of time. We have to regard the conduct now shown us by creatures of all orders, as an outcome of the conduct which has brought life of every kind to its present height. And this is tantamount to saying that our preparatory step must be to study the evolution of conduct. CHAPTER II. THE EVOLUTION OF CONDUCT.