Since the late 19th century, most treaties have followed <answer>a fairly consistent format</answer>. A treaty typically begins with a preamble describing the contracting parties and their joint objectives in executing the treaty, as well as summarizing any underlying events (such as a war). Modern preambles are sometimes structured as a single very long sentence formatted into multiple paragraphs for readability, in which each of the paragraphs begins with a verb (desiring, recognizing, having, and so on).
What is shared by most treaties since the late 19th century?
a fairly consistent format