Susan George
It seems there is no well-known American activist named Susan George born on July 26, 1950 (or at least no prominent records matching exactly those details). The name “Susan George” typically refers to two better-known figures online:
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Susan George (political scientist / activist / writer) — born in 1934 in the U.S., later a Franco-American scholar and critic of global inequality and debt.
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Susan George (actress) — an English film/TV actress born July 26, 1950.
Given the details you provided (American, activist, born 1950), it seems the data might be conflated—either the birth year is off or the descriptor “activist” was intended for Susan George the political scientist (1934) rather than the actress.