Thirty years ago, “Poland rationed sugar and flour while its citizens were paid one-tenth what West Germans earned,” the Associated Press reported this week. “Today, the economy of the country has edged past Switzerland to become the world’s 20th largest with more than $1 trillion in annual output.”

That’s quite a success story. Indeed, Poland’s per capita GDP is now roughly in line with the European Union average. It has a thriving entrepreneurial culture, a growing middle class, and is becoming an investment hub. Additionally, Poland’s largess has allowed it to field a first-rate military, rendering it one of NATO’s most ...

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