I love Gonick's "Cartoon History" series, and with this latest one, I have sadly completed the cycle... well, not really, since now I am enjoying starting over again reading them with my children. The art and humor make this compressed history more approachable, but don't be misled into thinking that these are juvenile works. They are exhaustively-researched scholarly offerings, complete with annotated bibliographies, footnotes, and sidebars. Just not dry.
Though the art in Modern World, Part 2 is among Gonick's best, it seemed to me that this one rushed its subject matter slightly more than the previous versions (although, perhaps that's because more recent material is more familiar). I enjoyed reading this simultaneously with Gonick's earlier Cartoon History of the United States, since the subject dates more or less overlap one another, and the latter work fills in the gaps that Modern World would otherwise leave on topics of principally American interest (like the Civil War, which gets barely a mention).
There are passages that could use a bit more depth, chiefly the discussion of both World Wars. Gonick's WWI makes only visual reference to the hell of trench fighting in a book which otherwise seamlessly combines text and imagery, thereby ignoring the clash of obsolete military strategy vs. contemporary technology from which it arose (though his earlier Cartoon History of the United States presciently picked up on Ulysses' Grant's slaughter of troops in the Civil War as a precursor to it). Likewise, the tide change of WWII is given as the strategic "blunders" of Hitler's betrayal of his original pact with Stalin and Japan's bombing of Pearl Harbor, where Gonick's earlier History of the US at least had the sophistication to point out that these decisions were the outcome of the German-Japanese military alliance upon Japan's entry into the war, made necessary by implacable U.S. opposition to both.
However, Modern World is best when it treats subject matter thematically, such as the late-19th century Japanese push to be "modern" (and how various world cultures defined this concept) and the impact of science on the development of the military-industrial complex, the rise of pseudoscience and the consequences of each (see "Spy vs. Spy" on pp. 224-225). The series as a whole is a must read, and again, this book is delightful when taken in conjunction with United States and otherwise a fitting end to the set. I almost can't wait to catch up with it again, (my kids have only yet gotten past Athens as of this review).