 At the same time, major differences have been noted between Gumilev's work and those of the original Eurasianists.Gumilev's work is controversial for its scientific methodology (the use of his own conception of ethnogenesis and the notion of "passionarity" of ethnoses).At any rate, Gumilev's work has been a source of inspiration for the Neo-Eurasianist authors, of whom Aleksandr Dugin has the highest profile.