This sounds like splitting hairs over semantics because applying that definition of artificial in this context is circular: all things humans do are artificial because artificial is defined as things humans do.
Humans gather at residential centers with populations in the millions, yeah, so do ants. Are we going to call that antificial?
The underlying point is that human beings have natural proclivities toward certain positive/healthy/beneficial behaviors, regardless of whether or not those behaviors occur spontaneously. This principle probably pervades nature beyond humanity, but Tolstoy's point is that only humans recognize this, and some deliberately place themselves in opposition.
Not matter what we call the words, I believe Tolstoy (and Ganhi, and Jesus, and the people replying to this post) are correct: the only way to succeed as civilization, whether it means ending violence or even just eliminating wealth gaps, is to recognize and develop love for one another.
Great insights.