Ron Ritchhart is a senior research associate with Project Zero at the Harvard Graduate School of Education, where he directs the worldwide Cultures of Thinking Project. He is also a fellow at the University of Melbourne, Australia, and a recipient of the Presidential Award for Excellence in Mathematics Teaching.

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Aaron Michael Ritchey is the author of twenty-one novels and numerous pieces of short fiction. He lives in Colorado with his wife and two daughters.

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Don Richard Riso is the foremost writer and developer of the Enneagram in the world today. The most-published and bestselling author in the field, he is an internationally recognized authority on the subject. He is the president of Enneagram Personality Types, Inc., and founder of The Enneagram Institute.

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Barbara J. Risman is Distinguished Professor of Arts & Sciences in the Department of Sociology at the University of Illinois at Chicago. She is the author of Gender Vertigo: American Families in Transition and coeditor of Families as They Really Are and Handbook of the Sociology of Gender.

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Dan Riskin, PhD, is an evolutionary biologist who has made several television appearances in the U.S. and Canada. Dan lives in Toronto with his family.

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Blythe Rippon teaches academic writing to undergraduates. When not grading papers or imagining plots for future novels, she is usually holding forth about the political injustice of the day, hiking, or experimenting in the kitchen. She can be found in the San Francisco Bay Area, where she lives with her wife and children.

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Victor Ripp is the author of Moscow to Main Street, Pizza in Pushkin Square, and Turgenev's Russia. His fiction has appeared in Ontario Review and Antioch Review. He has taught at Cornell University and the University of Virginia.

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Pernille Ripp is a seventh grade teacher in Oregon, Wisconsin, and the creator of the Global Read Aloud (theglobalreadaloud.com), a literacy initiative that has connected more than 2,000,000 students since 2010 through the use of technology. She is also author of Passionate Learners.

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Amanda Ripley is an investigative journalist for Time, the Atlantic, and other magazines. She is also the author of The Unthinkable: Who Survives When Disaster Strikes—and Why, the basis for a PBS documentary. An Emerson Fellow at the New America Foundation, she lives in Washington, D.C., with her husband and son.

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Victor M. Rios, a professor of sociology at the University of California, Santa Barbara, is the award-winning author of several books, including Street Life: Poverty, Gangs, and a PhD.

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Catherine Rios is an award-winning filmmaker and writer, an associate professor of humanities and communications at Penn State Harrisburg, and the author (with David Witwer) of Murder in the Garment District.

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John P. Riordan is a former vice president of Citibank. He spent more than a decade working with Citibank with a focus on the bank's branches in East Asia. John left the banking world in 1982 to focus on real estate investments and now owns and runs an environmental farm in Wisconsin next to some really big buffalo.

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