This promotes more unstable social relationships and more self-interested behavior. Unpredictable and harsh conditions lead to fast LH strategies. 

New Mexico Highlands University

LH Theory refers to whether one is focused on present mating with multiple partners and less parental effort, known as a fast LH strategy, or focused on future mating in a long-term relationship and more parental effort, known as a slow LH strategy. 

Life History (LH) Theory

Csathó, Á., & Birkás, B. (2018). Early-Life Stressors, Personality Development, and Fast Life Strategies: An Evolutionary Perspective on Malevolent Personality Features. Frontiers in psychology, 9, 305. https://doi.org/10.3389/fpsyg.2018.00305

Early-Life Stressors, Personality Development, and Fast Life Strategies: An Evolutionary Perspective on Malevolent Personality Features

These can contribute to internalizing and externalizing phenotypes. Internalizing problems can include anxiety, depression, and self-harm. Externalizing problems include opposition, delinquency, and hostility.

Life History Strategies and Physiological Responses

This is associated with higher executive functioning (EF), more emotional intelligence, less sexually coercive behavior, and less negative ethnocentrism.

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