Actually it is more correct to say "LSD was not illegal" rather than "LSD was legal" . Ken Kersey (the author of "One Flew Over the Cuckoos Nest " ) imported a couple of gallons of the stuff after he was given it whilst participating in a government drug reseach programme.
Like many drugs "Acid" was not classified as illegal until the authorities saw it (in their view) as a problem. Even Coca Cola originally contained cocaine hence the name. Thats when coke really was "The Real Thing "


