The Grandpa Hays Project

A Lifetime of Exploring Human Nature, Evolution, and Civilization

Stanford-trained biologist, former scientist, author, and philosopher exploring the deepest questions of human development and purpose

Ph.D. Biological Sciences Stanford University

Former Assistant Professor of Biology

U.S. Fish & Wildlife Service Scientist

Author & Natural Philosopher

starts here

New To Robert Hays?

Begin your journey with three essential ideas that form the foundation of his work

starts here

New To Robert Hays?

Begin your journey with three essential ideas that form the foundation of his work

The Gap
Theory

Explore Robert Hays' theory of the five-million-year period between the human chimpanzee split and the rise of civilization, where modern human nature evolved.

Natural Life Purpose

Discover a biological framework for life based on six natural stages from growing up and pairing to raising future generations.

Culture Civilization

Learn why cultures evolve through competition and how shared beliefs, values, and leadership shaped successful human societies

core Ideas

Explore The Core Ideas

Begin your journey with three essential ideas that form the foundation of his work

Human Nature

How language, consciousness, cooperation, and morality emerged during human evolution.

Natural Life Purpose

The six-clause biological framework for understanding human purpose.

Basic Social Unit

Why families and close social groups not isolated individuals are central to human development.

The Gap Theory

The missing evolutionary period between early hominins and civilization.

Western Civilization

The Enlightenment, evidence-based thinking, natural law, and the institutions that shaped modern society.

Culture Civilization

How beliefs, goals, manners, and traditions evolve through competition.

about the author

Robert L. hays

Robert L. Hays is a scientist, author, and independent philosopher whose work explores human nature, evolution, civilization, and the ideas that shape our world. Drawing from decades of research in biological science, he examines the values and principles that influence human development and society.

Through the Grandpa Hays Project, Robert shares knowledge and lessons focused on helping younger generations develop critical thinking, curiosity, and a deeper understanding of humanity. His mission is not fame or fortune, but making meaningful ideas accessible through affordable books and thoughtful writing.

Scientist. Philosopher. Author. Grandfather.

featured books

Books intended for youths

What is your life about?

Grandpa Hays's guide to a successful life, Volume 1 second edition

by Robert L. Hays

available versions:

Paperback, Kindle

Mastering your life as an individual

Grandpa Hays's guide to a successful life Book 2

by Robert L. Hays

available versions:

Paperback, Kindle

Mastering Your Social Life

Grandpa Hays's Guide To a Successful LIfe, Vol. 3

by Robert L. Hays

available versions:

Paperback, Kindle

featured books

COMPILATION

Compilation 1

Grandpa Hay's Substack Posts

by Robert L. Hays

available versions:

Paperback, Kindle

Compilation 2

Grandpa Hay's Substack Posts

by Robert L. Hays

available versions:

Paperback, Kindle

compilation 3

Grandpa Hay's Substack Posts

by Robert L. Hays

available versions:

Paperback

featured books

Books by robert l. hays

Mastering your life as an individual

Grandpa Hays's guide to a successful life Book 2

by Robert L. Hays

available versions:

Paperback, Kindle

western civilization 2

Based on the Gap Theory of Human Nature and Natural Law, Second Edition

by Robert L. Hays

available versions:

Paperback, Kindle

Values And Social Development

A Story of the Social Development of Life on Earth, Levels of Biological Development and Stages of Cultural Development

by Robert L. Hays

available versions:

Paperback, Kindle

featured books

Books intended for youths

What is your life about?

Grandpa Hays's guide to a successful life, Volume 1 second edition

by Robert L. Hays

available versions:

Paperback, Kindle

Mastering your life as an individual

Grandpa Hays's guide to a successful life Book 2

by Robert L. Hays

available versions:

Paperback, Kindle

Mastering Your Social Life

Grandpa Hays's Guide To a Successful LIfe, Vol. 3

by Robert L. Hays

available versions:

Paperback, Kindle

western civilization 2

Based on the Gap Theory of Human Nature and Natural Law, Second Edition

by Robert L. Hays

available versions:

Paperback, Kindle

Values And Social Development

A Story of the Social Development of Life on Earth, Levels of Biological Development and Stages of Cultural Development

by Robert L. Hays

available versions:

Paperback, Kindle

Compilation 1

Grandpa Hay's Substack Posts

by Robert L. Hays

available versions:

Paperback, Kindle

Compilation 2

Grandpa Hay's Substack Posts

by Robert L. Hays

available versions:

Paperback, Kindle

compilation 3

Grandpa Hay's Substack Posts

by Robert L. Hays

available versions:

Paperback

grandpahays.substack.com

Essays and Articles

Explore Robert L. Hays’ essays and articles on Substack, where he shares insights on human nature, civilization, science, philosophy, and the ideas that shape our world.

Subscription is free, and new posts are typically published every weekend.

Explore 300+ essays and read more at grandpahays.substack.com

Why not steal?

Two video phenomena recently caught my attention. One was short YouTube videos showing booby traps that cover a “porch pirate” or his car in paint or powder. Of course, a “porch pirate” is a person who steals a delivery package from a front porch. The other phenomenon was the wink-nod response in mainstream movies and literature to theft by people in need......

by Robert L. Hays

What’s new in biology

This week I’m posting something I prepared for the firm promoting my ideas. It is a summary of what I see as the major advances of my work......

by Robert L. Hays

How to understand someone

You’ve no doubt heard that humans are social. And that much of your life’s success and happiness depends on your social relationships. Fine. But how do you really get to understand someone else? What do you need to know? I assume, for this post, that you have a particular person in mind...

by Robert L. Hays

Podcasts, media and academia

Robert Hays Interviews and conversations about human evolution natural civilization, and the ideas shaping our fut

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