Marshall McLuhan was a well-known author and philosopher. He died in 1980. His most famous book was written in the '60's (my coming of age time, LOL). It was "The Medium is the Message."
Interesting guy - some quotes:
"Tomorrow is our permanent address."
"I may be wrong, but I'm never in doubt."
"The answers are always inside the problem, not outside."
"We look at the present through a rearview mirror. We march backwards into the future."
"Money is the poor man's credit card."
Okay - thats enough non-diaper related lecturing for now.