Which scientific event opened the intellectual door for psychologists to study the instinct as a potential grand theory of motivation?

Which ancient Greek philosopher believed that collective judgments were more likely to be wise and sound than the judgments of a few

a. Aristotle b. Cicero c. Horace d. Seneca

Third parties that believed in the "doctrine of progress" became primary challengers to the leading party in Texas during the ______ Era of American politics.

Fill in the blank(s) with the appropriate word(s).