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 that has had most effect upon our lives, but in the future physiology and. psychology are likely to be far more potent. When we have discovered how character depends upon physiological conditions, we shall be able, if we choose, to produce far more of the type of human beings that we admire. Intelligence, artistic capacity, benevolence—all these things no doubt could be increased by science. There seems scarcely any limit to what could be done in the way of producing a good world, if only men would use science wisely. I have expressed elsewhere my fears that men may not make a wise use of the power they derive from science. At present I am concerned with the good that men could do if they chose, not with the question whether they will choose rather to do harm.

There is a certain attitude about the