Domain SF's theme revolves around this:
The future has some profound, existential problems for our species to resolve if we are to persist into the far future. Two of the themes related to these problems are:
- What it means to be human
- How humans relate to the natural environment as their technologies become ever-more powerful
As soon as I read that I realised that my stoory was a perfect fit. Admittedly I've thought the same before about other stories and other venues, but this time I was right!