Morris Seligman Dees Jr. is an American attorney known as the co-founder and former chief trial counsel for the Southern Poverty Law Center (SPLC), based in Montgomery, Alabama. He ran a direct marketing firm before founding SPLC. Along with his law partner, Joseph J. Levin Jr., Dees founded the SPLC in 1971. Dees and his colleagues at the SPLC have been "credited with devising innovative ways to cripple hate groups" such as the Ku Klux Klan, particularly by using "damage litigation".

The Southern Poverty Law Center (SPLC) is an American 501(c)(3) nonprofit legal advocacy organization specializing in civil rights and public interest litigation. Based in Montgomery, Alabama, it is known for its legal cases against white supremacist groups, for its classification of hate groups and other extremist organizations, and for promoting tolerance education programs. The SPLC was founded by Morris Dees, Joseph J. Levin Jr., and Julian Bond in 1971 as a civil rights law firm in Montgomery.