Simplify the following text for a Grade 10 native English-speaking person.
Original: In response to the rise of European fascism in the 1930s Huxley was asked to write We Europeans with three other scientists .
Simplified: In response to the rise of European fascism in the 1930s he was asked to write We Europeans with the ethnologist A.C. Haddon , zoologist Alexander Carr-Saunders and historian of science Charles Singer .