Jobs existed the same way all the way back then as they do now.
Are you arguing that ancient societies had “jobs”, and in the same way that we do nowadays? I don’t intend to be rude (and sorry if I come off that way), but a simple Google search will tell you that’s false, but I’d be glad to cite you exact resources as well.
And that was the birth of capitalism
While the exact beginning of capitalism may be a subject of a little debate, no expert on the matter believes it goes that far back. Again, simple Google search reveals it, and I’ll be glad to cite you resources if you want.
Most didn’t own their land. It belonged to a king or emperor.
This wasn’t always true. There was a time that preceded class society. And not all class society is capitalism.
but to say capitalism didn’t exist back then isn’t accurate.
It is the scientific consensus that it did not.
I think we need to migrate to socialism via capitalism
Not sure what you mean here. Can you please elaborate?
whatever system you want them to transition to
It is simple. Instead of orienting society around profits and capital, we orient it around bettering the human condition. Instead of working our days to generate more profit for capitalists in exchange for money to buy necessities, we work to serve our interests and our own communities. So much wasted labor is suddenly removed.