Scott Adams is not worried about the usual things.
First, I’m not worried about any problem that we can see coming. If you look at the history of the world, almost any time we thought we knew something bad was going to happen AND we had years of warning, things turned out okay.
The human population did not outgrow the food supply.
Earth didn’t run out of oil in the eighties.
The Y2K problem was solved.
The Soviet Union didn’t nuke us.
Vietnam did not set off much of a domino effect.
AIDS hasn’t annihilated the hetero population in the U.S.
With that in mind, I’m not worried about North Korea, global warming, Iran, the Rapture, al-Qaeda getting a nuke, the real estate bust causing a depression, running out of oil (again), immigration destroying America, bird flu, the next generation becoming morons, or any number of other widely predicted disasters.
So he lists what he is worried about.