Forget Russian SF, what about Dances With Wolves? It’s almost the exact same plot.
The ‘Goin’ Native/White Man’s Burden’ plot has been used throughout the 20th century in various guises.
BTW for those who don’t know of the Strugatsky Brothers, their fiction is best known in the West for being the source of the 1979 Tarkovsky film ‘Stalker’.
Or “Fern Gully” the animated enviro film.