intimately

[10] with religious belief and is supposed to be under divine patronage,
criticism of the social order savours of impiety, while criticism of the
religious belief is a direct challenge to the wrath of supernatural
powers.

The psychological motives which produce a conservative spirit hostile to
new ideas are reinforced by the active opposition of certain powerful
sections of the community, such as a class, a caste, or a priesthood,
whose interests are bound up with the maintenance of the established
order and the ideas on which it rests.

Let us suppose, for instance, that a people believes that solar eclipses
are signs employed by their Deity for the special purpose of
communicating useful information to them, and that a clever man
discovers the true cause of eclipses. His compatriots in the first place
dislike his discovery because they find it very difficult to reconcile
with their other ideas; in the second place, it disturbs them, because
it upsets an arrangement which they consider highly advantageous to
their community; finally, it frightens them, as an offence to their
Divinity. The priests, one of whose functions is to interpret the divine
signs, are alarmed and enraged at a doctrine which menaces their power.

In prehistoric days, these motives, operating

[11] strongly, must have made change slow in communities which
progressed, and hindered some communities from progressing at all. But
they have continued to operate more or less throughout history,
obstructing knowledge and progress. We can observe them at work to-day