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germ-plasm. Evolution is always slow, and, for that
very reason, sure.
If these conclusions are correct, they have an important practical bearing. Struggle and effort are essential to progress. Not inborn talent alone, but the use which one makes of it, counts in evolution. The effects of use and disuse are cumulative. The hard-fought battle of past generations becomes an easy victory in the present, just because of the strength acquired and handed down from the past struggle. Persistent variation toward evil is in time weeded out by natural selection. And, while evil remains in the world, we are to lay up stores of strength for ourselves and our descendants by sturdily fighting it. But the effects of right living through a hundred generations are not overcome by the criminal life of one or two. Evil surroundings weigh more in producing criminals than heredity, and their children are not irreclaimable.
The struggles and victories of each one of us encourage the rest. There is, to borrow Mr. Huxley's language, not only a survival of the fittest, but a fitting of as many as possible to survive. And in the midst of the hardest struggle there is the peace which comes from the assurance of a glorious triumph.
Condensed Chart of Development of the Main Line of the Animal Kingdom leading to Man.
KNOWLEDGE, value of, 150, 229, | Prayer, 259
LAW, Divine, 245
Locomotion and nervous develop-
Love, 139, 180, 243
Mammals, 85, 92; oviparous, 86;
Man, 210, 219; anatomical char-
Mind, 115, 144; amoeba, 33
Mollusks, 58, 106
Productiveness and prospective-
REFLEX action, 125, 135, 146
SEQUENCE of functions, 80, 109,
Sexual reproduction, 33, 37, 41
Motives, 136, 148; sequence of, Size, 35, 51, 72, 76, 89, 214
Muscular system, 309; hydra,
Natural selection, 12, 152, 278
Neo-Darwinians and Neo-Lam-
Nervous system, 102; hydra, 38;
PHYLOGENESIS, 26, 100, 310
Skeleton, 58, 74; mollusks, 59;
Social life, 182, 217
Struggle for existence, 11, 158,
Worms, 56; schematic, 52