The lasting significance of Stanislavski's early work at the MAT lies in its development of a Naturalistic performance mode. In 1898, Stanislavski co-directed with Nemirovich the first of his productions of the work of Anton Chekhov. The MAT production of "The Seagull" was a crucial milestone for the fledgling company that has been described as "one of the greatest events in the history of Russian theatre and one of the greatest new developments in the history of world drama." Despite its 80 hours of rehearsal—a considerable length by the standards of the conventional practice of the day—Stanislavski felt it was under-rehearsed. The production's success was due to the fidelity of its delicate representation of everyday life, its intimate, ensemble playing, and the resonance of its mood of despondent uncertainty with the psychological disposition of the Russian intelligentsia of the time.