@Hadriel:
That's what evolutionists want. Common ancestry and genetic code means only one catalyst or origin. That is unwise.
Are you guys telling me that you know unequivocally that the common genetic code we see that it could have only started one possible way, that being happenstance?
Either someone forgot tot tell you, or you missed it: LUCA means Last Universal Common Ancestor.
Please note the Last, as opposed to First. LUCA was not the first life form. Nor was it all alone in itself time. Most likely it was a member a very interesting and crowded community of different primitive microbial life forms. It's also likely that at that time horizontal gene transfer took place (e.g. between different life forms, in addition to vertical gene transfer from generation to next generation), so different life forms influenced each other.
Formal testing has pointed to a single organism being the LUCA to all organisms currently alive (that we know about). This is much more likely than current life having multiple, non-related ancestors.
What does all of this mean for you?
- No happenstance. Life probably started in different places, in different ways, with different life forms as a result.
- Somewhere down the line all lifeforms died, except descendants of a specific lifeform we now call LUCA.
- 'Evolutionists' (is that similar to Gravitationists?) don't point to LUCA as a result of a single catalyst. LUCA points to a bottleneck sometime long ago.
Think of it this way: according to the Bible myth, Noah is mankind's Last Common Paternal Ancestor. That does not mean he was either the first man, or the only man in his time.
I hope this clears thing up a bit for you.
https://en.wikipedia.org/wiki/Last_universal_ancestor?wprov=sfla1