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The Welcome to another episode of Conversations with Coleman.

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My guest today is Sean Carroll. Sean Carroll is a theoretical physicist specializing in quantum

mechanics, gravity, and cosmology.

He's a research professor in the Walter Burke Institute for Theoretical Physics in the California

Institute of Technology Department of Physics. He's been a contributor to the physics blog,

Cosmic Variance, and has published in scientific journals such as nature, as well as other publications,

including the New York Times, Sky and Telescope, and the New Scientist.

Sean has his own podcast called Mindscape, which I listen to and highly recommend,

and it was in fact one of his episodes that inspired me to reach out to him.

Sean did a podcast about how he approaches morality as someone who doesn't believe in God,

who believes questions of right and wrong are socially constructed, but nevertheless important.

And he used the examples of vegetarianism and racial and gender-based bias in society.

And he did something like a 90-minute podcast on the issue,

and I found that I appreciated his approach,

but actually disagreed with him both on the question of vegetarianism

and on the question of how prevalent bias is in society. So I reached out to him

...