Tolstoy’s day-to-day engagement with nature shaped who he was and how he conceived of himself; it is reflected, abundantly, in what he wrote. But while the natural world remained an essential touchstone for Tolstoy for the whole of his life – a reservoir and measure of what was authentic and good – as he grew older this regard was tinged with ambivalence. He came to believe that not everything that was natural (war, violence, predation, sex) was necessarily good, and he appears to have doubted whether humans could live in a way that was at once fully natural and fully moral. This essay explores this central paradox of Tolstoy’s thinking, and focuses particular attention on the following aspects of his relationship with the natural world: the "green" creation myth that Tolstoy self-consciously fashioned about himself; the close link between nature and Tolstoy’s sense of the divine; Tolstoy’s presciently ecological conception of life in nature as a realm of both ceaseless "struggle" (war) and overarching harmony (peace); Tolstoy’s environmentalism.