Read the quotation from John L. O'Sullivan’s "The Great Nation of Futurity. " "[F]reedom of conscience, freedom of person, freedom of trade and business pursuits, universality of freedom and equality. This is our high destiny, and in nature's eternal, inevitable decree of cause and effect we must accomplish it. All this will be our future history. " The idea O'Sullivan describes in this quotation is manifest destiny. Frontier destiny. The frontier thesis. Manifest freedom.