I found out on a recent wikipedia trawl that my view on this is effectively 'panpsychism'. I don't think that rocks or the wind have complex thoughts, but I do believe that all matter has some sort of fundamental experience to it, and that this synchronises to make stuff like brains.
I do think plants and some microbes have more complex feelings though :)
It's wild to me that most multicellular organisms are symbiotic with other kingdoms of life. Like, not only do mammals have gut microbiomes, we also have cerebrospinal fluid microbiomes! And how roots need fungi to break down the soil for them.
It's as if each creature is a mountain of its own, with its own flora and fauna ^-^