While I've read this book many times over the years, my most recent reading struck me hard. The description of the May 8, 1970 meeting between Henry Kissinger and a number of his friends and personal advisors from Harvard did not seem especially interesting in past years, but jumped off the page this time around. Thomas Schelling told Kissinger that after the invasion of Cambodia the group no longer had faith in Henry or the Nixon administration's ability to conduct foreign policy, and would have nothing further to do with Kissinger. The group pointed out that the invasion could be "used by anyone else in the world as a precedent for invading another country, in order, for example, to clear out terrorists." Another section recounts Arthur Schlesinger Jr. quoting a historian's recollection of the Romans -- "There was no corner of the known world where some interest was not alleged to be in danger or under actual attack. If the interests were not Roman, they were of Rome's allies; and if Rome had no allies, the allies would be invented." Shawcross also notes that in 1964 the US condemned Britain for assaulting a Yemeni town used as a base by insurgents attacking Aden. Another chilling touch is the mention of Lincoln's reaction when he was advised that the President could invade a neighbor if necessary to repel invasion -- Lincoln replied, "Study to see if you can fix any limit to his power in this respect, after you give him as much as you propose." Lincoln's famous speech given as a young man in the 1830s in which he remarked that all the armies of Europe could not forcibly take a drink of water from the Ohio River and therefore "... if this great nation is to ever die, it will be from suicide" rings more true than the words of today's politicians proclaiming the right to declare preemptive war.
An excellent summary of the events that overtook Cambodia, "Sideshow" has much more to offer to us today as we try to figure out how we reached this turning point in our history and recall how badly things can go wrong whenever we deviate from the principles upon which our nation was founded.