Susan Cain

On March 31, 2020, Cain published Quiet Journal: Discover Your Secret Strengths and Unleash Your Inner Power, a journal with a first section directed to self-assessment, and a second section for applying that self-knowledge and prompting action.

In 2018, Cain began co-curating the Next Big Idea Club with Malcolm Gladwell, Adam Grant, and Daniel Pink, focusing on books about psychology, business, happiness, and productivity.

In 2016, Cain co-authored Quiet Power: The Secret Strengths of Introverts, which focused on introverted children and teens, the book also directed to their educators and parents.

Cain, a self-described introvert, had grappled with her own introversion as a Wall Street attorney before writing Quiet. In contrast, Cain described the time of creating Quiet—seven years of reading, researching, and thinking—as "total bliss". Initially concerned that the book would be merely a "highly idiosyncratic project", she found instead that New York book publishers engaged in a bidding war.

Cain's second TED talk (2014) formally announced the Quiet Revolution—a "venture backed, mission-based" organization for transforming office architecture to combat the erosion of focus and privacy in modern offices, forming a Quiet Leadership Institute to help organizations train introverted leaders, and empowering quiet children. The organization focuses on areas including children, life, and the workplace, while providing training programs and learning tools for client organizations to use in managing employees. More specifically, the organization formed an online education course for parents, a co-branded lifestyle section in The Huffington Post, a podcast, a website to support a community including writers and advocates, and young-adult books and shows whose heroines are quiet leaders. Quiet Revolution implemented a Quiet Ambassador initiative, for which it trained volunteers to be embedded in schools, businesses and other participating organizations.

Seven years in the making, Cain's book, Quiet: The Power of Introverts in a World That Can't Stop Talking, was published January 24, 2012.

Cain wrote that her year of preparation before her February 2012 TED talk had unfolded in "three stages of accelerating dread", so she joined Toastmasters and scheduled a two-hour crash course with TED's speaking coach. But saying her butterflies had turned into "gut-wrenching knots", Cain worked for six full days with an acting coach immediately before the talk. Three months after the talk, Cain confirmed her April 2011 prediction that the ensuing year would be her Year of Speaking Dangerously, writing that she had metamorphosed into what she termed an "impossibly oxymoronic creature: the Public Introvert". The Atlantic's Megan Garber remarked that the ideas spread by TED are becoming defined by the persona of the speaker who presents them, citing Cain in particular as representing the idea of the power of introversion in an extrovert-optimized world. Chris Weller quipped in Business Insider that Cain had become "the patron saint of introverts".

Cain graduated from Princeton University with a Bachelor of Arts degree in English in 1989 and earned her Juris Doctor degree from Harvard Law School in 1993.

Susan Horowitz Cain (born 1968) is an American writer and lecturer, and author of the 2012 non-fiction book Quiet: The Power of Introverts in a World That Can't Stop Talking, which argues that modern Western culture misunderstands and undervalues the traits and capabilities of introverted people. In 2015, Cain co-founded Quiet Revolution, a mission-based company with initiatives in the areas of children (parenting and education), lifestyle, and the workplace. Cain's 2016 follow-on book, Quiet Power: The Secret Strengths of Introverts, focused on introverted children and teens, the book also being directed to their educators and parents.

Cain explained that in writing Quiet she was fueled by the passion and indignation that she imagined fueled the 1963 feminist book, The Feminine Mystique. Cain likened Introverts today to women at that time—second-class citizens with gigantic amounts of untapped talent. Saying that most introverts aren't aware of how they are constantly spending their time in ways that they would prefer not to be and have been doing so all their lives, Cain explained that she was trying to give people entitlement in their own minds to be who they are.