---
title: "Self-Interest Definition and Impact | Model Diplomat"
description: "Self-interest is a key concept in Adam Smith's theory, where individuals act for personal gain, benefiting society through market exchanges."
url: "https://modeldiplomat.com/learn/glossary/self-interest"
---

[New](https://modeldiplomat.com/)

#

Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- A fundamental concept in Adam Smith's theory, suggesting that individuals act in their own interest, benefiting society as a whole.
- What role does self-interest play in economics?
- Is self-interest always positive?
- Who popularized the concept of self-interest in economics?

[Leaders & Thinkers](https://modeldiplomat.com/learn/leaders/glossary)Updated June 22, 2026

A fundamental concept in Adam Smith's theory, suggesting that individuals act in their own interest, benefiting society as a whole.

Go beyond the definition

## Research Self-Interest like a delegate

Model Diplomat's AI drafts position papers, speeches, and country research with real sources — built for MUN and politics students.

## Research it like a delegate

Research on modeldiplomat.com

## Ask a follow-up about Self-Interest

Open a cited briefing in Model Diplomat search — timelines, positions, and sources you can use in committee or exam answers.

[Start research on Self-Interest](https://modeldiplomat.com/search?q=Explain%20Self-Interest%20%E2%80%94%20key%20dates%2C%20actors%2C%20positions%2C%20and%20sources)

Example

According to Adam Smith, self-interest drives individuals to create goods that benefit society.

Keep learning

## Go deeper than the definition

Courses

[Adam Smith](https://modeldiplomat.com/learn/courses/adam-smith)

[Explore all Leaders & Thinkers lessons](https://modeldiplomat.com/learn/leaders)[Test yourself with a quiz](https://modeldiplomat.com/learn/glossary/quiz/leaders)

## Take Self-Interest beyond the glossary

Ask the AI research engine built for diplomacy — get briefings, position papers, and speeches with sources you can cite in committee.