You don’t have to be Jewish to understand the history of Europe in the 20th century, but it helps.
The fear of life is the favorite disease of the 20th century.
As someone who has more than a passing acquaintance with most of the 20th century presidents, I have often thought that their accomplishments have little staying power in shaping popular views of their leadership.
One layer was certainly 17th century. The 18th century in him is obvious. There was the 19th century, and a large slice, of course, of the 20th century; and another, curious layer which may possibly have been the 21st.