I am an American, not by accident of birth but by choice. I voted with my feet and became an American because I love this country and think it is exceptional.

But now, we are becoming suspicious of the very things we have long celebrated - free markets, trade, immigration, and technological change. And all this is happening when the tide is going our way. Just as the world is opening up, America is closing down.

Whenever someone says the word community, I want to reach for an oxygen mask.

If you listen to the political discourse in America today, you would think that all our problems have been caused by the Mexicans of the Chinese or the Muslims. The reality is that we have caused our own problems. Whatever has happened has been caused by isolating ourselves or blaming others.

California has often led the country, indeed the world, in the technology, consumption, trends, lifestyles, and of course, mass entertainment. It is where the car found its earliest and fullest expression, where suburbs blossomed, where going to gym replaced going to church, where forces that lead so many to assume that direct democracy is the wave of the future - declining political parties, telecommuting, new technology, the internet generation 0 are all most well developed in this vast land.

Media reporters have pointed out that the paragraphs in my Time column this week bear close similarities to paragraphs in Jill Lepore's essay in the April 22nd issue of The New Yorker. They are right. I made a terrible mistake. It is a serious lapse and one that is entirely my fault. I apologize unreservedly to her, to my editors at Time, and to my readers.

The Berlin Wall wasn't the only barrier to fall after the collapse of the Soviet Union and the end of the Cold War. Traditional barriers to the flow of money, trade, people and ideas also fell.