We Americans tend to take the great strengths of our country for granted. In the hubbub of political debate, we concentrate on things that are allegedly wrong with America and lose sight of our great achievements. We make up only 4 percent of the world's population. Yet we lead the world in many ways, and the rest of the world -- or that part of it not in the thrall of evil regimes -- depends on us for many of the things necessary to the good life.

Cases in point: Most people in the rest of the world are free riders on the productivity and ingenuity of the American military and American medicine. They get the benefits of American military protection and American medical innovation without paying, or without paying in full, for them.

This has been the case all through the six decades after the Second World War. The American military has protected democracies from Communist expansion and today protects people all over the world from Islamist extremists. They get this service, if not free of charge, then at reduced rates. American taxpayers have been spending 4 percent of gross domestic product on our military and during the Cold War paid twice that share. NATO and most other allies spend significantly less.

American administrations of both parties have tried to get others to spend. But this is Sisyphus' work. We are entitled to take pride in the fact that, in the spirit of "From those to whom much is given much is asked," we are able to do so much for others.

Unfortunately, the Obama administration wants to do less. Defense has been scheduled for spending cuts. We are halting at lower than scheduled levels production of the F-22 fighter, whose brilliant advanced design is intended to assure American control of the skies for decades to come. The administration also seems to be scaling back missile defense, which could protect friends and allies from nuclear attack and over time might discourage nuclear proliferation.

The administration is expanding our ground forces, who have shown that with the right strategy they could achieve victory in Iraq and, one hopes, again in Afghanistan. But limiting the number of F-22s and holding back on missile defense would reduce the advantage our high-tech military expertise can give us and our free riders as well.

We also may be at risk of squandering our high-tech advantage in medicine. As Scott Atlas of the Hoover Institution points out, the top five American hospitals conduct more clinical trials than all the hospitals in all other developed countries. America has outpointed all other countries combined in Nobel Prizes for medical and physiology since 1970. Continued...