Evolutionary Psychology by Dr David Buss

Evolved preferences and biases for avoiding danger, managing fear, disgust (disease avoidance), and learning certain fears faster than others.
Emotions are framed as coordinating programs that prioritize certain actions under specific conditions (fear → escape; disgust → avoidance; anger → bargaining/defense, etc.).

A major core of the book is mating psychology:

Mate preferences (e.g., cues to health/fertility; cues to resource acquisition and commitment) and why some preferences differ by sex on average.
Short-term vs. long-term mating as distinct strategic “modes,” triggered by context (mate availability, status, goals, risk).
Jealousy, mate guarding, and infidelity as products of recurrent reproductive conflicts and uncertainty (including paternity uncertainty).
Attractiveness is treated as partly a signal system (symmetry, youth cues, body shape cues, etc.), while acknowledging cultural variation and individual differences.

Parental investment theory: because children are costly, selection favored mechanisms for allocating effort (who to invest in, when, and how).
Mother–child and father–child dynamics, step-parenting patterns, sibling conflict, and how family relationships reflect competing genetic interests.

Kin selection: why we’re more likely to help genetic relatives.
Reciprocal altruism: cooperation with non-kin when there’s repeated interaction and the ability to track cheaters.
Cheater detection and social exchange reasoning: humans are argued to be especially attuned to fairness, freeloading, and reputation.

Aggression is examined as sometimes strategically used (resource competition, status defense) rather than as a single “instinct.”
Male–male competition, risk-taking, dominance, and the role of status in mating and social outcomes.
Also covers sexual coercion, partner violence, and the conditions that predict conflict—presented as controversial areas where Buss emphasizes careful hypothesis-testing.

Humans as an intensely social species: mechanisms for coalitions, hierarchy navigation, friendship, and reputation.
Morality and social norms are framed as partly emerging from evolved pressures for cooperation, punishment of cheaters, and group living—while culture shapes the specific rules.