In his later essay "A Philosophical View of Reform", Shelley did concede that there were political circumstances in which force might be justified: "The last resort of resistance is undoubtably ["sic"] insurrection. The right of insurrection is derived from the employment of armed force to counteract the will of the nation." Shelley supported the 1820 armed rebellion against absolute monarchy in Spain, and the 1821 armed Greek uprising against Ottoman rule.