NEW YORK – The late Alan Clark, a British politician of the Margaret Thatcher era, chiefly known for his womanizing and his hard-right views, once lamented to me the decline of the British fighting spirit that built empires and won wars. Half in jest, I suggested that this aggressive disposition was still there among British soccer hooligans who ransack stadiums and foreign towns. He replied with a dreamy look in his eyes that this was indeed something that “might be usefully tapped.”