To study the past as it was is also to speculate about the past as it might have been. What if Hitler had successfully invaded Britain in 1940? Would German now have been the language of international commerce? What if Lenin had died on the train that took him back to his homeland in 1917? Would Russia now be a constitutional monarchy on the British model? And, closer home, consider these intriguing questions: what if Mohammed Ali Jinnah had died in 1958 instead of 1948? Would Pakistan then be as solidly established a democracy as India? And what if General Yahya Khan had allowed Sheikh Mujibur Rahman to take office as prime minister of Pakistan in 1970, to honour the popular mandate in his favour? Would there yet have been a Bangladesh?