Authors:

To understand the difficulty of predicting the next 100 years, we have to appreciate the difficulty that the people of 1900 had in predicting the world of 2000.

"The Introduction to my Newly Released Book, Physics of the Future!" by Michio Kaku, bigthink.com. 2017.
To understand the difficulty of predicting the next 100 years, we have to appreciate the difficulty that the people of 1900 had in predicting the world of 2000.