Arthur C. Clarke on Why Aliens Would Be Superior To Humans on The Dick Cavett Show (1972)

 https://www.youtube.com/watch?v=dVPLm0vlQHw

ACC had a strong interest in the possibility of advanced ET life.

https://en.wikipedia.org/wiki/Arthur_C._Clarke#Rendezvous_with_Rama

https://arthurcclarke.org/site/legacy/fiction/fiction-ac