As best I can tell there was no advance warning of the attack on the World Trade Center in 1993, which was the first significant foreign terrorist activity in the U.S. No tip-offs that it was coming.
“In listing these tendencies making for a new world, we must not forget developments in the religious or spiritual thinking and feeling of mankind, where also we feel a strong unifying trend.”
“We do not know, in most cases, how far social failure and success are due to heredity, and how far to environment. But environment is the easier of the two to improve.”