Quebec's path diverged from the 13 colonies due to four decisive historical forces:
Quebec founded by French settlers (Champlain); 13 colonies by English settlers (1607 Jamestown). Different language (French), religion (Catholic), law (Civil Code), and governance (seigneurial).
Seven Years' War / French and Indian War ended with France ceding Canada to Britain (Treaty of Paris 1763). Quebec became a British colony—not a fellow rebel.
Britain guaranteed French civil law, Catholic religion, and seigneurial tenure—and extended Quebec's territory to the Ohio River. This secured Canadien loyalty and infuriated American colonists (listed as an "Intolerable Act").
Quebec evolved into Lower Canada (1791) → Canada East (1841) → Quebec (1867) within British North America → Confederation. The French Catholic distinctness, British constitutional guarantee, and geographic separation made union with the U.S. structurally impossible.