W: This shows that racial diversity is not occurring everywhere. Then what about other types of diversity?
M: Right. The second type of diversity is age diversity.
And there're some interesting age gaps developing between states.
For example, there is a large gap between the average age of the 5 states with the youngest populations, and the 5 states with the oldest populations.
This of course is well known.
What is less discussed is the difference between the racial make-up of the younger and older populations.
Most of the populations having the greatest racial diversity are younger on average than the populations with great Caucasian representation.
It is also well known that Caucasians tend to be more affluent than other ethnic groups on average.
In our pay-as-you-go social security system, workers are taxed to pay the benefit to retirees.
So this could lead to a future, where wealth is systematically redistributed from younger poor minorities, to older wealthier whites.
W: This is a very interesting point. Then what is the third type of diversity in the U.S.?
M: The third is religious diversity.
Immigration from India, Pakistan and Mid-east brought radically increasing numbers of Hindus and Muslims to the US.
And Chinese, Vietnamese, Japanese and other Asian immigrants increase the numbers of Buddhists.
W: Oh, I see.
M: But the point is that these religions didn't settle everywhere.
They settled mainly in California and major in northeastern and mid-western cities, such as New York, Philadelphia, Chicago and Minneapolis.
From 1990 to 2000, the number of Muslims in New York City grew from 600,000 to nearly one million.
In the Los Angles area, there are now more than 300 Buddhists temples.
W: So we see that many parts of the U.S. are truly becoming more diverse, while at the same time, others are centrally remaining the same in terms of race, age and religion.
M: Yes, that is true.
W: Ok, Dr. Johnson, Thank you very much for coming on the show and talking to us.
M: My pleasure.