Figure life at 70 years across all ages. Again, optimistic. 60 years of consistent writing. 333 days a year, to get to 20,000 days of writing our little minds out. How many words per day? 250 is considered 1 page of text by most. And that sounds about average for people of a wide array of human communication. For a grand total of 5,000,000 words in a lifetime.
Multiply by 7,000,000,000 souls and you get 35,000,000,000,000,000 words written in human existence or 35 American quadrillion times a blurb has come out as a word. (Meanwhile, Erin Andrews has graced us with her illustrative presence throughout. Showing a picture can be worth a quadrillion words.)
Just words...that's all they really were.