I don’t see how invoking Jordan Peterson’s ‘Darwinian Truth’ gives any weight to the claim that all the universe is love. I would agree that you could indeed hold it to be an axiom.
You might believe that it is beneficial for humans to hold this axiom to be true and act accordingly, but this is still your subjective opinion. It supposes that humans are a worthy universal end, and the axiom remains an axiom.
I don’t know what you mean by unbroken maternal lineage. My maternal experience was very much broken. From what my mother has told me, so was hers.
What is the extension of deep inner child maternal love to encompass the test of humanity? Is it not just another way of saying that you just wish that everything were hunky dory? Things don’t seem to work that way in Darwin’s world.
I don’t want to disregard the idea of unconditional love for family and beyond. Many people can afford it. However, many people can’t, and it isn’t a truth that we must strive towards either.
There is a multitude of subjective value systems which man has chosen to live by, ostensibly, collectively and in private. Some have chosen to build empires, never having children. Some have chosen to build loving families. In neither case is it guaranteed that a majority will wake up smiling and feeling happy every day. That’s fine too.