Former British Prime Minister Tony Blair intended his bracing meditation on the state of the nation to land as a shock to the center-left system and its inadequacy to face up to urgent problems for the U.K. at home and abroad. That aim has been fulfilled: His essay, in excess of 5,000 words, published late Tuesday, has dominated the political airwaves in the run-up to a crucial by-election in June and a potential summer leadership challenge to his Labour successor Keir Starmer.  But the