In 1975 Bok coauthored the statement "Objections to Astrology", which was endorsed by 186 professional astronomers, astrophysicists, and other scientists, including nineteen winners of the Nobel Prize. The statement was published in The Humanist and copies were sent to every major newspaper in the US. This led to the formation of the Committee for the Scientific Investigation of Claims of the Paranormal (now called the Committee for Skeptical Inquiry), of which he was a founding Fellow. In 2000, Bok was voted by readers of Skeptical Inquirer magazine as one of the "outstanding skeptics of the twentieth century". At a meeting of the executive council of CSI in Denver, Colorado in April 2011, Bok was selected for inclusion in CSI's Pantheon of Skeptics. The Pantheon of Skeptics was created by CSI to remember the legacy of deceased fellows of CSI and their contributions to the cause of scientific skepticism.