In sociological thermodynamics, Richard Delgado (c.1948-) is an American law professor noted for his 1990 metaphorical-type conservation of energy version of a racism law.  In particular, what Delgado has termed the law of racial thermodynamics, states that: 
“There is change from one era to another, but the net quantum of racism remains exactly the same. Racism is neither created nor destroyed.”
This has been paraphrased as: “racism is never destroyed but always comes back in new forms.” 
Delgado completed his AB in mathematics and philosophy in circa 1972 at the University of Washington and his JD in 1974 at the University of California at Berkeley. 
● Erich Müller
1. Delgado, Richard. (1990). “Does Voice Really Matter?” Virginia Law Review, 76: 105-06.
2. D’Souza, Dinesh. (1996). The End of Racism: Principles for a Multiracial Society (pg. 17). Simon and Schuster.
3. Feagin, Joe R., Vera, Hernan, and Batur, Pinar. (2001). White Racism: the Basics (pg. 219). Routledge.
4. (a) Richard Delgado – Curriculum vitae.
(b) Richard Delgado (faculty) – University of Pittsburgh, Law School.
● Richard Delgado – Wikipedia.