[Coyoteman]

I have said that I remember from the textbooks I was taught from in the 60's that the "Protein sea" and "a bolt of lightning" were Step 1₁ and step 1₂.

Perhaps you had a Biology textbook which covered more than just evolution. You know, like steps 1 through n...

[xzins]

I've got a fairly decent memory and did fairly well in school. My memory says they were taught as one and the same at that time, that they always were connected. You didn't see one without the other.

I wish I could find the texts. My old zoology teacher sang at my wedding (great baritone), but he has since passed away.