In 1849, Lowell said of himself, "I am the first poet who has endeavored to express the American Idea, and I shall be popular by and by."[133] Poet Walt Whitman said: "Lowell was not a grower—he was a builder. He built poems: he didn't put in the seed, and water the seed, and send down his sun—letting the rest take care of itself: he measured his poems—kept them within formula."[134] Fellow fireside poet John Greenleaf Whittier praised Lowell by writing two poems in his honor and calling him "our new Theocritus" and "one of the strongest and manliest of our writers–a republican poet who dares to speak brave words of unpopular truth".[135] British author Thomas Hughes referred to Lowell as one of the most important writers in the United States: "Greece had her Aristophanes; Rome her Juvenal; Spain has had her Cervantes; France her Rabelais, her Molière, her Voltaire; Germany her Jean Paul, her Heine; England her Swift, her Thackeray; and America has her Lowell."[123] Lowell's satires and use of dialect were an inspiration for writers like Mark Twain, William Dean Howells, H. L. Mencken, and Ring Lardner.[136]
Contemporary critic and editor Margaret Fuller wrote, "his verse is stereotyped; his thought sounds no depth, and posterity will not remember him."[137] Evert Augustus Duyckinck thought Lowell was too similar to other poets like William Shakespeare and John Milton.[138] Ralph Waldo Emerson noted that, though Lowell had significant technical skill, his poetry "rather expresses his wish, his ambition, than the uncontrollable interior impulse which is the authentic mark of a new poem ... and which is felt in the pervading tone, rather than in brilliant parts or lines."[139] Even his friend Richard Henry Dana Jr. questioned Lowell's abilities, calling him "very clever, entertaining & good humored ... but he is rather a trifler, after all."[140] In the twentieth century, poet Richard Armour dismissed Lowell, writing: "As a Harvard graduate and an editor for the Atlantic Monthly, it must have been difficult for Lowell to write like an illiterate oaf, but he succeeded."[141] The poet Amy Lowell featured her relative James Russell Lowell in her poem A Critical Fable (1922), the title mocking A Fable for Critics. Here, a fictional version of Lowell says he does not believe that women will ever be equal to men in the arts and "the two sexes cannot be ranked counterparts".[142] Modern literary critic Van Wyck Brooks wrote that Lowell's poetry was forgettable: "one read them five times over and still forgot them, as if this excellent verse had been written in water."[139] His The Vision of Sir Launfal (1848), was called "one of the worst constructed poems written in English" and "the most disorganized poem ever written".[143] Nonetheless, in 1969 the Modern Language Association established a prize named after Lowell, awarded annually for "an outstanding literary or linguistic study, a critical edition of an important work, or a critical biography."[144]
Lowell's poem "The Present Crisis", an early work that addressed the national crisis over slavery leading up to the Civil War, has had an impact in the modern civil rights movement. The National Association for the Advancement of Colored People named its newsletter The Crisis after the poem, and Martin Luther King Jr. frequently quoted the poem in his speeches and sermons.[145] The poem was also the source of the hymn "Once to Every Man and Nation".[146]
