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Past Caltech Lectures

Natural Experiments of History

Jared Diamond

SOME CENTRAL QUESTIONS in the natural and social sciences can’t be answered by controlled laboratory experiments, often considered to be the hallmark of the scientific method. This impossibility holds for any science concerned with the past. In addition, many manipulative experiments, while possible, would be considered immoral or illegal. One has to devise other methods of observing, describing, and explaining the world. Jared Diamond, author of the Pulitzer-prize winning Guns, Germs, and Steel and the bestselling work in environmental history Collapse, here reveals for the first time his methodology in the applied use of natural experiments and the comparative method. In this lecture based on his new edited volume, Natural Experiments of History, Diamond presents eight comparative studies drawn from history, archaeology, economics, economic history, geography, and political science. The studies cover a spectrum of approaches, ranging from a non-quantitative narrative style to quantitative statistical analyses. The studies range from a simple two-way comparison of Haiti and the Dominican Republic, which share the island of Hispaniola, to comparisons of 81 Pacific islands and 233 areas of India. The societies discussed are contemporary ones, literate societies of recent centuries, and non-literate past societies.

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Top 10 Things You Should Know About Alternative Medicine

Top 10 Things You Should Know About Alternative Medicine

Harriet Hall, MD (aka the SkepDoc), shares her wit and wisdom about alternative medicine including: chiropractic, the placebo effect, homeopathy, acupuncture, and the questionable benefits of organic food, detoxification, and ‘natural’ remedies.

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Learn to be a Psychic in 10 Easy Lessons

Learn to be a Psychic in 10 Easy Lessons

Psychic readings and fortunetelling are an ancient art — a combination of acting and psychological manipulation. While some psychics are known to cheat and acquire information ahead of time, these ten tips focus on what is known as “cold reading” — reading someone “cold” without any prior knowledge about them.

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The Mind of the Market
by Michael Shermer

In this eye-opening exploration, Shermer uncovers the evolutionary roots of our economic behavior and explains how evolution shaped the modern economy.
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The Bible
Against Itself

by Randel Helms

The Bible frequently seems to contradict itself. Randel Helms discusses these contradictions by looking at the cultural and historical factors that produced them.
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