Yes well, that's depend how you quantify intelligence. If you believe that I.Q. test are testing intelligence, then you should read about the flint effect.
Quote : "In his study of IQ tests scores for different populations over the past sixty years, James R. Flynn discovered that IQ scores increased from one generation to the next for all of the countries for which data existed (Flynn, 1994). This interesting phenomena has been called "the Flynn Effect." Many of the questions about why this effect occurs have not yet been answered by researchers. This site attempts to explain the issues involved in a way that will better help you to understand the Flynn Effect. It also provides references for further inquiry. "
On the other hand, if you don't believe in the I.Q. test, then, according to the level of hatred, violence and threat that exist in the world, you would probably agree that people are definitely not smarter. They have just more money.