Reproduction, control of, 70, 79, 
100, 190, 253, 341 
by controlling ovum growth, 88 
by rhythm regulation, 107 
by social means, 275, 283-284, 
290 
by vasectomy, 106 
comparison of methods, 84, 85 
genetic aspects, 256-261, 274—- 
277, 278-298 
immunological methods, 81 
moral factors, 100, 101 
political aspects, 101 
possible use of thymus extract, 
108 
public opinion, 102 
use of hot baths, 105 
with Enovid, 82 
with ethynodiol diacetate, 86 
with norethynodrel, 82, 83 
with 19-norsteroids, 86 
right of, 275, 282 
Research, 272 
Reserpine, effect on ovarian follicle, 
81 
Resistance to infection, 212-214 
Resources, agricultural, 28 
natural, shortage of, 5 
over-exploitation of, 13 
utilization of, 9 
world, 7, 57 
Revolution, 334. 
Riboflavin, molecule of, 193 
Ribonucleic acid, 207, 266, 312 
Rice, cultivation of, 71 
refining of, 47 
Riparian settlement, 136 
Ritual, importance of, 120, 124 
Roman Catholic opinion on contra- 
ception, 293, 341 
Root crops, value of, 24 
Russell, Bertrand, 18, 177 
Salmonella, drug resistance to, 200 
Science, ethical force of, 369-370 
explosion of, 170 
growth of, 363-364 
history of, 188 
integration of, 8 
Index 
Science—continued 
leading to totalitarianism, 174 
relationship with religion, 167, 
178, 371, 372, 379 
reorganization of, 8 
responsibility of, 165, 166 
saturation of civilization by, 171 
Scrapie, 203 
Sea lions, 337 
Sedentariness, 136, 141 
Self-regulating social mechanisms, 
156 
Semen, preservation of, 98, 107, 258, 
261, 276, 278-279 
Senses, supernormal, 34.5 
Sex determination, 97, 113, 116, 
E27 
Sexual activity, variations in, 338 
Shelley, Percy Bysshe, 169 
Simmonds’ disease, 223 
Skill, development of, 34.7 
Sloths, 237 
Smoking, and cancer, 208 
Snow, C. P., 18 
Social behaviour, 334 
Social groups, see also Societies 
building towns, 139 
effect of environment, 129, 133 
equilibrium of, 121, 124 
ethics, 375, 376, 378 
evolution of, 122 
growth and development of, 120 
integration of, 168 
man-environment relationship in, 
136 
mobility of, 136 
morality, 375 
role of energy, 123 
sedentariness of, 136, 141 
stability of, in towns, 140 
Social organization, 173 
Social systems, flexibility of, 127 
rate of change, 128 
Societies, see also Social groups 
and machines, 153 
as cognitive information-systems, 
163 
manipulation of, 162, 164, 177 
predictions, 174, 175, 183, 184 
409 
