New Delhi, Jan. 13 -- Congress MP Manish Tewari on Monday warned that the collapse of the post-World War II global order had pushed India into an "orderless world" where preserving strategic autonomy and internal cohesion will be the country's biggest challenge, as he laid out the arguments of his new book A World Adrift. The book was released by former external affairs minister Yashwant Sinha at the India International Centre in Delhi, with senior Congress leaders and former diplomats in attendance. Tewari said at the heart of his book was the idea that the post-1945 international system had "completely collapsed", leaving behind a vacuum in which power equations were unsettled. "The relentless rise of China, a revolution in military affairs driven by technology, and the weakening of multilateral institutions, had together created an unstable interregnum," he said. Drawing on his years in Washington as a senior fellow at Atlantic Council, Tewari said he had sensed as early as 2016 that the US was weary of being the world's principal balancer of power after the wars in Iraq and Afghanistan. "What I did not foresee, was that Washington has also actively undercut the very order it had built," he said, pointing to US pullbacks from multilateral institutions and growing strains within NATO....