The late 18th century was not altogether different from the early 21st century, as it turns out. Both were moments “of acute awareness about globalization.” People living during the revolutionary years in British North America thought of themselves as living in an interconnected world, and they believed their Declaration of Independence had importance on a global scale. As Armitage points out in his book, however, scholars have tended to consider the American declaration and others like it as unique to their states of origin, as “written embodiments of…exceptionalism.” The time is ripe, therefore, to “rethink American history in a global age,” and attempt to recapture the global intentions and global repercussions of the United States’ founding document.
Armitage treats the declaration like the birth of a genre. Thinking of ideas in this manner – as a particular artistic style, or a template – makes their adaptation seem less like the copying of brilliance and more like a shared global project. The Americans created “the flexible instrument” of the genre, and subsequent peoples used it in their unique circumstances. Plus, the unique context of the American Declaration of Independence is vital to understanding it. Thomas Jefferson and his fellow delegates in Philadelphia did not invent the declaration because they were geniuses, or because they loved liberty in a way that other people did not. The flexible instrument was born because the specific political circumstances in which the American Revolution took place convinced those delegates (and other people) that some kind of official statement was necessary. So they improvised one. Furthermore, no matter how brilliant and freedom loving other people around the world may have been, this genre was much more likely to arise first in the Atlantic World than anywhere else. A sort of geopolitical perfect storm was necessary – a situation in which one people felt the need to create a new state, had a group of other independent states nearby to whom they could apply for assistance, and so felt the need to put their assertions in writing for the judgment of this “candid world.”
Armitage closes the book with a dozen or so declarations of independence from around the world, from the USA, to Haiti to Venezuela in the early 19th century, to Vietnam and Rhodesia in the mid-20th century. These are a little boring to just plow through, but the differences do turn out to be pretty interesting. Maybe you should just skim them.