The Sum of All Fears is a 2002 American spy thriller film directed by Phil Alden Robinson, based on Tom Clancy's 1991 novel of the same name. The film, which is set in the Jack Ryan film series, is a reboot taking place in 2002. Jack Ryan is portrayed as a younger character by Ben Affleck, in comparison with the previous films: The Hunt for Red October (1990) starring Alec Baldwin as Jack Ryan and the sequels, Patriot Games (1992) and Clear and Present Danger (1994), both starring Harrison Ford in the role.

An Austrian Neo-Nazi plans to trigger a nuclear war between the United States and Russia, so that he can establish a fascist superstate in Europe. After the Neo-Nazi's scientists build a secret nuclear weapon that is detonated in Baltimore, and a rogue Russian officer paid off by the Neo-Nazi attacks a U.S. aircraft carrier, the world's superpowers are pushed close to the brink of war. CIA analyst Jack Ryan (Affleck) is the only person who realizes that the Baltimore bomb was a black market weapon, not a Russian one. With the clock ticking, Ryan has to find a way to stop the impending nuclear war.

The film was a co-production between the motion picture studios of Paramount Pictures, Mace Neufeld Productions, MFP Munich Film Partners, and S.O.A.F. Productions. On June 4, 2002, the original motion picture soundtrack was released by the Elektra Records music label. The soundtrack was composed and orchestrated by musician Jerry Goldsmith. The movie premiered in theaters in the United States on May 31, 2002.

The Sum of All Fears received mixed reviews from critics but was a financial success, having a worldwide theatrical run of $193.9 million compared to its production budget of $68 million and related marketing costs.