Index 
Infectious diseases—continued 
prevention of, 196 
resistance to, 212-214, 231, 235- 
236 
spread of, 196 
susceptibility to, 212-214 
Information-flow, 154 
Information-flow, models, of society 
163 
Information-retrieval, 160, 162 
Information storage, in animals, 311 
Information systems, 154, 155 
Institutions, 123 
Intelligence, genetic increase in, 
259, 276, 284, 285, 286, 288-289, 
294, 297; 351 
Intuition, 186 
Iproniazid, 306 
Iron metabolism, 53 
Japanese diet, 29 
Jats, 351 
Keynes, J. M., 156 
Kinaesthetic memory, 346 
Knowledge, advancement of, 6 
progress and, 7 
use of, 21 
Koprowski, Hilary, 196-216 
Kwashiorkor, 67 
Labour, division of, 123 
Lactation, effect of Enovid, 84 
Lamarck, J. B. P., 244 
Land, available for agriculture, 34, 
70 
required for food production, 32, 
34, 58 
required to feed one person, 29, 58 
Land ethic, 134 
Land use, changes in, 134, 139, 143 
management of, 9, 10 
specialization of, 143 
Law, and social stability, 125 
use of computers, 160, 162, 176 
Leaf protein, 67, 69, 73, 74, 75 
Learning, chemical factors, 310-313 
Lederberg, Joshua, 263-273 
406 
Leisure, and food technology, 42 
Leukaemia, susceptibility to, 212 
Libraries, mechanization of, 160 
Life, expectation of, 14 
mystery of, 190, 192 
nature of, 194 
origin of, 2 
prolongation of, see Longevity 
Life expectation, and obesity, 48 
role of diet, 43 
Lifespan, 218, see also Longevity 
effect of diet, 219, 225 
effect of over-eating, 219 
effect of radiation, 219-220 
factors affecting, 218-219 
increase of, 226-228 
prolongation of, 197, 221—222 
prolongation of vigour, 226, 227 
Liver, adverse effect of food addi- 
tives, 52 
effect of malnutrition, 64 
Longevity, 217-229, 340, 341, 368 
see also Lifespan 
control of, 221-222 
demographic effects, 226 
effect of medicine, 218 
of tissue in storage, 224 
Lorenz, Konrad, 331 
Loyalty, to group, 317, 318, 319 
Lysergic acid diethylamide (LSD- 
25), 307 
Machines, and ageing, 232 
and societies, 153 
as models, limits of, 165 
dangers of, 171 
function of, 153 
government by, 174, 175 
limitation of, 162, 179, 180 
thinking by, 178 
valid judgements from, 178, 179, 
180, 182 
MacKay, D. M., 153-167 
Maize, 72 
Malaria, eradication of, 201 
Males, excess of, 94, 95, 96, 111, 114, 
115 
Malignant disease, antigen in cells, 
208 
