Algorithms to Live By

"The 37% Rule defines a simple series of steps—what computer scientists call an "algorithm"—for solving these problems." The 37% Rule. This mathematical principle suggests that when faced with a series of options (like potential partners or job candidates) and needing to choose the best one, you should examine 37% of the options to establish a baseline, then choose the next option that's better than all those you've seen. This rule applies to various life decisions: The rule balances the risks of stopping too early (missing out on better options) and stopping too late (having already passed th

Lesson 1: Optimal Stopping: When to Commit in Life's Decisions

One of the most counterintuitive ideas in Algorithms to Live By: knowing when to stop is as important as knowing when to push. Brian Christian argues that the clearest path to failure is an inability to define what 'enough' looks like for you personally.

Lesson 2: Explore vs. Exploit: Balancing New Experiences and Favorites

This principle from Algorithms to Live By is backed by Brian Christian's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

Lesson 3: Sorting: The Power and Limitations of Organizing Information

This principle from Algorithms to Live By is backed by Brian Christian's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

How to Apply Algorithms to Live By's Lessons

The real value of Algorithms to Live By lies in its applicability. After reading, the most important step is identifying which of Brian Christian's principles speak most directly to your current situation.

Consider keeping a journal while reading — noting where the ideas challenge your current approach and where they confirm what you already suspected. The friction of your own resistance often points to the most important insights.

Key Quote

"Optimal Stopping: When to Commit in Life's Decisions" — Brian Christian, Algorithms to Live By

About the Author

Brian Christian is the author of Algorithms to Live By. The book reflects years of research, observation, and synthesis of evidence from multiple disciplines.