Passage 2
On a conservative estimate the Uruguay round would permanently raise global welfare by more than $100 billion a year, spur economic growth everywhere, and extend competition to hitherto sheltered, and therefore backward, parts of all economies. By any standards, it would be a hugely valuable achievement.
Such opportunities come too rarely to be squandered. 【Yet this one still may be】.
340.Why would an economy be backward once it is “sheltered”?