by Elatan-(Valar) aka Amillo-(Valar)
Dec. 10, 1999
Mankind > Ringwraiths > Ringwraiths

    The Ringwraiths had no great physical power against the fearless, but their greatest weapon was the unreasoning fear they inspired and which was enormously increased in darkness. They did not scream but kept a more terrifying silence. The Ringwraiths were evil Nùmenòreans or Sauronians.
    What he (Tolkien) means by Sauronians I am not sure of. Breedings from Southrons and Numenoreans perhaps? Or just men/kings from countries under his dominion?

Reference: Letters of Tolkien