The current Republican candidates are incapable of effectively leading individually.

On Saturday, Texas Gov. Rick Perry got into the race for the GOP presidential nomination, and within 24 hours, former Minnesota Gov. Tim Pawlenty got out. Perry didn't exactly chase Pawlenty out of the race; the Iowa straw poll (in which T-Paw finished a distant third) did that. But the two developments are closely related. They're linked by the fact that Barack Obama is very beatable.

Science has become political, but too few politicians and citizens are well-versed in science. Even though science and technology will be the focus of many of the challenges facing the next president, there has been little discussion of any of these issues in the campaign thus far. Mr. Krauss will...

Spending on health care takes up about double the share of GDP that it took thirty years ago.

Screams of Reason is a pioneering book that uncovers the deep roots of many common fears of our age.

As the second Gulf war begins, we peer into the sandstorm, straining to discern the outline of the new world beyond. Like most new worlds, this is actually a mix of old and new.

In the long run, the United States can remain a nation of immigrants and open to the world, while also maintaining our exceptional character and enhancing our security.