These are my thoughts on your piece, Rain fell tonight.
First I need to say, I usually like rhyming forms, but this caught my eye. I felt the same way you have about rain, and our ancestors and predecessors. Yet I am thinking, "Hooray! We got rain." then, "now I'll have to push the lawnmower again!" Lol.
Overall: A very insightful glance at what we have become, and where we came from. Well written and thought provoking.
Grammar/punctuation: I saw no errors, or anything needing attention.
Favorite part: The 4th stanza about listening to their advice. Also, the final sentence of, "I ache to once in my lifetime..." Well done Harry!
Take care, and keep pushing the pen that which comes from within.