Self-actualization (Psychology) 3 English fiction 2 Motivation (Psychology) 2 Power (Philosophy) 2 Seduction 2 Self-confidence 2 Adventure and adventurers 1 Environmental disasters 1 Extinction (Biology) 1 Ford, Doc (Fictitious character) 1 Friendship 1 Happiness 1 Libraries 1 Marine biologists 1 Mass extinctions 1 Schools 1 Self-realization 1 Spies 1 Zombies 1