It is really an anti-war poem rather than anti-humanity or about nature in general. Sara Teasdale was forced to write her sentiments obliquely. From Wikipedia:
> "The Sedition Act of 1918 enacted two months before the original publication of "There Will Come Soft Rains" made it a criminal offense to "willfully utter, print, write, or publish any disloyal, profane, scurrilous, or abusive language about the form of the Government of the United States" and forced Teasdale to express her opposition to World War I "obliquely" in what might appear to be a pastoral poem."
If you think about it, Bradbury's story is also anti-war.
> "The Sedition Act of 1918 enacted two months before the original publication of "There Will Come Soft Rains" made it a criminal offense to "willfully utter, print, write, or publish any disloyal, profane, scurrilous, or abusive language about the form of the Government of the United States" and forced Teasdale to express her opposition to World War I "obliquely" in what might appear to be a pastoral poem."
If you think about it, Bradbury's story is also anti-war.