Michael Steinberger's new biography, The Philosopher in the Valley, explores the life and leadership of Alex Karp, the enigmatic chief executive of Palantir. The book traces Karp's journey from his unconventional upbringing and academic pursuits to cofounding Palantir, a company at the center of major global issues, from counterterrorism to humanitarian aid. Steinberger paints a portrait of Karp as a principled and candid leader, committed to using technology for the defense of Western values and the greater good, even as he faces criticism for Palantir's close ties to the security establishment and its support for Israel.

While the biography attempts to scrutinize Karp's motives and the company's influence, it ultimately highlights his moral clarity, dedication to privacy, and insistence on open debate within his organization. Karp's steadfast support for America's allies and his belief in the responsible use of technology are depicted as both his greatest strengths and the source of ongoing controversy. The review suggests that, despite the author's critical tone, Karp emerges as a figure whose vision and leadership continue to shape the intersection of technology and global security.