fected by age, fatigue, and health; capacity for in men and
animals; drill and attention in; importance of habit of; process of
(_see also_ Education, and Reflection); trial-and-error.
Le Bon.
Lee, Frederick S..
Lincoln.
Logic, and language.
Love.
Lowell.
Loyalty.
Lucretius.

McDougall.
Malthus.
Man, as social being; primitive; study of, basis of ethics; unique
characteristics of.
Marett.
Markham, Edwin.
Marot, Helen.
Marx, Karl.
Masefield.
Mayo-Smith.
Mendelian laws of heredity.
Mental activity.
Meyer, Eduard.
Mill, John Stuart.
Mills.
Milton.
Moral action; knowledge; standards; theory, types of; values.
Morality, absolutistic; and art; and education; and emotion; and habit;
and human nature; and intellectualism; and law; based on instincts;
customary; empirical; inadequacy of theory in; intuitional; reflective;
relativistic and teleological; spontaneous.
Morley, John.
Mysticism.

Napoleon.
Nature, and art; man's control of; science as explanation of;
unchangeability of.
Need, and religious experience.
New, progress and the; distrust of; idealization of. _See also_ Originality.
Newton.
Nietzsche.
Northcliffe, Lord.
Noyes, Alfred.

Observation in science.
Opinion, individuality in; suppression of.
Originality in thinking, causes of; encouragement of; fear of, in society.
_See also_ New.
Orosius.
O'Shaughnessy.
Other-worldliness.

Parental instinct.
Pascal.
Past, critical examination of; disparagement of; education as transmitter
of; idealization of; limitations of; our heritage from; veneration of.
Pasteur.
Pater, Walter.
Pearson, Karl.
Penance.
Personality. _See also_ Self.
Physical activity, instinct of; fatigue.
Pity, instinct of.
Plato.
Play. _See_ Physical activity, and Recreation.
Pleasure.
Poe.
Poincare.
Pope.
Population; restriction of.
Possession. _See_ Acquisitive.
Praise and blame, as instruments of social control; determine professed
standards; in development of self; indifference to; man responsive to.
Prayer.
Prejudice, influences thinking.
Primitive and civilized races; language; man's manufacture of tools;
morality; religion; science.
Principles.
Privacy, instinctive demand for.
Probability.
Progress, and custom; and pugnacity; and reflection; and variation from
normal; science as an instrument of.
Propaganda, art as; emotional value of words in.
Psychological tests. _See_ Intelligence, measurement of.
Psychology, and ethics; behavi