Published January 15, 2026
4 min read

Why are people selfish?

Short Answer

People are selfish due to evolutionary survival instincts, self-preservation needs, limited resources, self-interest, and sometimes because selfish behavior has been rewarded or necessary for survival.

Detailed Explanation

Background

Selfishness is often viewed negatively, but it's also a fundamental aspect of human nature that has helped us survive throughout evolution. While excessive selfishness can harm relationships and communities, some degree of self-interest is natural and necessary. Understanding why people are selfish helps us balance our own needs with the needs of others and respond more effectively to selfish behavior in others. Understanding Why are people kind? reveals how humans balance self-interest with helping others.

Research in evolutionary psychology and behavioral economics shows that self-interest is deeply rooted in human nature. Throughout evolution, prioritizing one's own survival and resources increased chances of survival and reproduction. Today, while cooperation is also important, self-interest continues to influence our behavior. By understanding these motivations, we can develop healthier relationships with our own needs and respond more constructively to selfishness in others. Understanding Why do people help others? shows how humans balance self-interest with cooperation, and What is self-serving bias? reveals how we naturally attribute success to ourselves.

Scientific Explanation

People are selfish for several evolutionary and psychological reasons:

  1. Survival instincts: Throughout evolution, prioritizing one's own survival and resources increased chances of survival and reproduction.

  2. Self-preservation: Protecting oneself and one's resources is a fundamental drive that helps ensure survival and well-being.

  3. Limited resources: When resources are scarce, self-interest helps ensure access to necessary resources for survival.

  4. Self-interest: Looking out for one's own interests is natural and helps people meet their needs and achieve their goals.

  5. Learned behavior: Selfish behavior that has been rewarded or necessary in the past can become habitual.

  6. Fear and insecurity: People may act selfishly when they feel insecure, threatened, or afraid of not having enough.

  7. Lack of empathy: Difficulty understanding or caring about others' needs can lead to more selfish behavior.

Real Examples

  • Someone prioritizes their own needs in a relationship because they've learned that looking out for themselves is necessary for survival.

  • A person hoards resources because they fear scarcity and want to ensure they have enough for themselves.

  • Someone acts selfishly at work because they believe it's necessary to advance their career and protect their interests.

  • A person prioritizes their own comfort over others' needs because they've learned that self-care is important.

  • Someone acts selfishly in social situations because they're insecure and trying to protect themselves from rejection or harm.

Practical Application

How to Apply

To balance self-interest with consideration for others:

  1. Recognize your needs: Understand your own needs and interests so you can meet them in healthy ways.

  2. Practice empathy: Develop empathy to understand others' needs and perspectives, balancing them with your own.

  3. Find win-win solutions: Look for solutions that benefit both you and others rather than just yourself.

  4. Set boundaries: Learn to set healthy boundaries that protect your needs while also considering others.

  5. Reflect on your behavior: Regularly reflect on whether your actions are appropriately balanced or excessively selfish.

  6. Consider long-term consequences: Think about how selfish behavior might affect relationships and community long-term.

  7. Practice generosity: Regularly practice generosity and helping others to balance self-interest with concern for others.

How to Understand Others

When others act selfishly:

  • Their selfishness often reflects survival instincts, fear, or learned behavior rather than intentional harm.

  • Understanding that some self-interest is natural helps you respond with appropriate boundaries rather than just judgment.

  • People act selfishly for various reasons, and their behavior reflects their needs and circumstances.

  • Recognizing that everyone balances self-interest and concern for others helps you respond more constructively.