Final answer:
The Reign of Terror best supports a communist interpretation of French history, with its push to dismantle traditional class structures and the monarchy, despite its violent and tumultuous nature.
Step-by-step explanation:
The event during eighteenth- and nineteenth-century French history that would best support a communist interpretation is likely the Reign of Terror. The Reign of Terror started with the execution of King Louis XVI and marked a period where revolutionary forces, primarily the Jacobins supported by the sans-culottes, pushed to eradicate the monarchy and establish a more radical form of government. This aligns with communist ideology in terms of challenging the existing class structures and asserting the will of the common people over traditional elites. However, the Reign of Terror itself was a complex mixture of democratic aspirations and extreme violence against perceived enemies, which, while creating a more egalitarian society on paper, resulted in a tumultuous and bloody era.