110 | Neil Johnson on Complexity, Conflict, and Infodemiology

110 | Neil Johnson on Complexity, Conflict, and Infodemiology

Physicists have traditionally simplified systems as much as possible, in order to shed light on fundamental properties. But small, simple parts build up into large, complex wholes. Are there new rules and laws of nature that apply specifically to the realm of complexity? This has been a popular question for a few decades now, and we have some answers but not as many as we would like. Neil Johnson is an expert on complex systems generally, and information networks in particular. We discuss how self-organization can arise from individual units following their own agendas, and how we can mathematically characterize such behavior. Then we talk about information networks in the modern world, including how they have been used to spread disinformation and find recruits for radical fringe groups.

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Neil Johnson received his Ph.D. in physics from Harvard University. He is currently professor of physics at George Washington University, where he heads an initiative in Complexity and Data Science. In 1999 he presented the annual Christmas Lectures at the Royal Institution in London. He was the recipient of the Burton Award from the American Physical Society in 2018. Among his books are the textbook Financial Market Complexity and the trade book Simply Complexity.

Episoder(424)

85 | L.A. Paul on Transformative Experiences and Your Future Selves

85 | L.A. Paul on Transformative Experiences and Your Future Selves

It's hard to make decisions that will change your life. It's even harder to make a decision if you know that the outcome could change who you are. Our preferences are determined by who we are, and the...

24 Feb 20201h 14min

84 | Suresh Naidu on Capitalism, Monopsony, and Inequality

84 | Suresh Naidu on Capitalism, Monopsony, and Inequality

Nations generally want their economies to be rich, robust, and growing. But it's also important to person to ensure that wealth doesn't flow only to a few people, but rather that as many people as pos...

17 Feb 20201h 26min

83 | Kwame Anthony Appiah on Identity, Stories, and Cosmopolitanism

83 | Kwame Anthony Appiah on Identity, Stories, and Cosmopolitanism

The Greek statesman Demosthenes is credited with saying "I am a citizen of the world," and the idea that we should take a cosmopolitan view of our common humanity is a compelling one. Not everyone agr...

10 Feb 20201h 38min

82 | Robin Carhart-Harris on Psychedelics and the Brain

82 | Robin Carhart-Harris on Psychedelics and the Brain

The Convention on Psychotropic Substances was a 1971 United Nations treaty that placed strong restrictions on the use of psychedelic drugs — not only on personal use, but medical and scientific resear...

3 Feb 20201h 17min

81 | Ezra Klein on Politics, Polarization, and Identity

81 | Ezra Klein on Politics, Polarization, and Identity

People have always disagreed about politics, passionately and sometimes even violently. But in certain historical moments these disagreements were distributed without strong correlations, so that any ...

27 Jan 20201h 21min

80 | Jenann Ismael on Connecting Physics to the World of Experience

80 | Jenann Ismael on Connecting Physics to the World of Experience

Physics is simple; people are complicated. But even people are ultimately physical systems, made of particles and forces that follow the rules of the Core Theory. How do we bridge the gap from one kin...

20 Jan 20201h 26min

79 | Sara Imari Walker on Information and the Origin of Life

79 | Sara Imari Walker on Information and the Origin of Life

We are all alive, but "life" is something we struggle to understand. How do we distinguish a "living organism" from an emergent dynamical system like a hurricane, or a resource-consuming chemical reac...

13 Jan 20201h 23min

78 | Daniel Dennett on Minds, Patterns, and the Scientific Image

78 | Daniel Dennett on Minds, Patterns, and the Scientific Image

Wilfrid Sellars described the task of philosophy as explaining how things, in the broadest sense of term, hang together, in the broadest sense of the term. (Substitute "exploring" for "explaining" and...

6 Jan 20202h 1min

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