The world's most valuable resource is talent. No country grows enough of it. Some, however, enjoy the colossal advantage of being able to import it. Rich, peaceful countries can attract clever immigrants. Unlike other useful imports, they cost the recipient country nothing. They come, they study, they work, they set up businesses, they create jobs: 40% of the founders of Fortune 500 companies are immigrants and their children. Yet they are only 23% of Americans.
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