Final answer:
The 'Show Me State' nickname for Missouri reflects the skeptical and self-reliant character of its citizens. While its exact origin is unknown, it denotes that Missourians require proof before believing something. Historical events, such as debates over slavery during state expansion, likely shaped this regional identity.
Step-by-step explanation:
The nickname Show Me State is associated with Missouri and while the exact origin is not definitively known, it is commonly believed to reflect the skepticism and self-reliant attitudes of its citizens. This nickname implies that Missourians are not gullible—they need to be shown proof before they believe something.
Looking through the historical context surrounding Missouri, particularly during times of expansion and the debate over slavery, it becomes clear that Missouri has been at the center of critical moments in U.S. history. These experiences might have contributed to the attitudes and character which led to the nickname 'Show Me State'.