Portales' influential political stance included unitarianism, presidentialism and conservatism which led to consolidate Chile as a constitutional authoritarian republic with democracy restricted to include only upper class men.
While deeply unpopular during his lifetime, the murder of Portales in 1837 during a mutiny has been judged a decisive factor during the War of the Confederation by switching Chilean public opinion to support the war against the Peru–Bolivian Confederation.