A.J. Jacobs

A. J. Jacobs is an American journalist, author , lecturer , and self-described human guinea pig best known for immersion journalism projects in which he conducts extreme lifestyle experiments and chronicles their effects in New York Times bestselling books that blend memoir, science, and humor. As editor at large for Esquire magazine and a contributor to NPR and Mental Floss , Jacobs has explored topics ranging from reading the entire Encyclopædia Britannica in The Know-It-All to attempting to follow every rule in the Bible literally for a year in The Year of Living Biblically . Other notable experiments include outsourcing all aspects of his life, pursuing total bodily health in Drop Dead Healthy , expressing radical gratitude by thanking thousands of people involved in everyday objects, and building a global family tree to demonstrate human interconnectedness in It's All Relative . His works often probe human behavior , societal norms, and personal growth through first-hand trials, earning him TED talks, media appearances on programs like Oprah and the Today Show , and recognition for four bestselling titles.

Arnold Stephen Jacobs Jr., known as A. J. Jacobs, was born on March 20, 1968, in New York City to secular Jewish parents, Arnold Jacobs Sr., a lawyer , and Ellen Kheel. He has one sister, Beryl Jacobs.

Jacobs' father, a partner at Proskauer Rose LLP specializing in labor and employment law, achieved notoriety in legal academia for authoring a law review article with a world-record 4,824 footnotes, emphasizing exhaustive documentation and scholarly precision. This meticulous approach, as Jacobs has noted in his writings, reflected a family ethos of thoroughness in intellectual endeavors.

Raised in a secular household in New York City , Jacobs experienced minimal religious observance despite his Jewish heritage; his family forwent traditions such as seders or bar mitzvahs, instead incorporating nominal symbols like a Star of David atop a Christmas tree . This environment fostered an early familiarity with books and ideas, though without formal religious structure, prioritizing cultural identity over ritual practice.

A. J. Jacobs attended Brown University , where he majored in philosophy and graduated in 1990 with a Bachelor of Arts degree, earning magna cum laude honors. His choice of philosophy as a major stemmed from its minimal credit requirements, allowing flexibility in coursework while engaging with abstract reasoning and ethical questions central to the discipline.

During his time at Brown , Jacobs demonstrated an early inclination toward unconventional intellectual exploration through academic writing, including an anthropology paper examining the symbolic elements of bong hits, reflecting a nascent interest in dissecting everyday practices through analytical lenses. This period fostered his development as a thinker drawn to experiential and interpretive approaches, influenced by Brown 's open curriculum that encouraged interdisciplinary pursuits over rigid structures.

Upon completing his studies, Jacobs recognized the scarcity of professional opportunities for philosophy graduates, prompting a shift toward writing and media as outlets for his analytical skills, distinct from the theoretical confines of academia. This transition highlighted how his university experience equipped him with a foundation in rigorous inquiry, setting the stage for applying philosophical curiosity to real-world observation without immediate immersion into professional experimentation.

Jacobs commenced his professional journalism career shortly after earning a Bachelor of Arts degree in philosophy from Brown University in 1990. His initial role was as a reporter at the Antioch Daily Ledger , a small daily newspaper serving the community near San Francisco, California, where he gained foundational experience in local reporting and news gathering.