If it were really possible to explain millions of years of Earth data with a theory that doesn't also imply a recent human influence on the climate, some ambitious, self-interested team of scientists somewhere in the world would seek scientific renown by doing so, writes Robert Lempert.
The Turkish model -- with its emphasis on secularism and democracy -- has obvious appeal in a region burdened by corrupt, autocratic, incompetent, and inefficient governments. But Turkey's historical experience and political evolution differ in important ways from Arab countries', writes F. Stephen Larrabee.
The U.S. government is historically adept at tactics, but what President Obama needs are more people with a broader perspective. That includes engaging outsiders with a solid background in the Middle East, writes Robert E. Hunter.
The question, then, is whether stopping the fighting—which could also require forcibly removing Qaddafi—is worth the price of deep military engagement and responsibility for Libya's postwar future, writes Robert E. Hunter.
We have learned over the past couple of decades that it is deceptively easy for the world's only superpower to topple objectionable regimes—but a good deal harder to replace them with something better, writes James Dobbins.