And then Cain says to God: "I will be a restless wanderer on the earth, and whoever finds me will kill me." And God responds: "Not so; anyone who kills Cain will suffer vengeance seven times over." And God "put a mark on Cain so that no one who found him would kill him." (Genesis 4, 14-15)
But who are they? (whoever, anyone, no one) At this point in the story there should only be three people on earth: Adam, Eve and Cain. And in the following verse it says that "Cain made love to his wife".
Where does she come from?
One possible explanation is that the story of creation talks about one specific tribe, among other tribes that would pre-exist to the family of Adam, or at least co-exist.
Which is kind of relevant to the debate of different species of humans.
The fact that according to Genesis 4 other people did exist is a very good but in my opinion completely different issue.
Although it's certainly true that Genesis 3 suggests thorns, thistles and other nastier parts of nature weren't around at first, which again fits the "man came first" aspect of the Genesis 2 creation story.
However, it is also important to recognize that they were brought together and redacted by an editor (or committee of editors, perhaps even spread out over time) that arranged and tweaked the stories. At the very least, it is easy to glean from the text that they are intended to form a whole "collection," with connections between the various myths. The textual evidence suggests that the connections are stronger than that.
So while it is the more common error to underappreciate the differences between the accounts, it is a less common but equally erroneous mistake to underappreciate the "unity" (of a sort) that they have.
If we assume harmony between Genesis 1:11-13 (fruits/grains) and Genesis 2:5 (bush/plants of the field) then it is clear that fruit was the chief food in the garden and agriculture came later.
If one of them was not correct nobody would have put them in the same bible.
Focusing on "correct" is the wrong approach to reading these old mythological parts of the Bible. People put these stories in the Bible because of their story and meaning, not because of any kind of historical correctness. (Because how could they know?)
Quoting a bit more from the article:
> Like other folk zoologists, the Lio put humans first, most notably as the origin of nonhuman animals, a sort of Darwinism in reverse. In contrast, evolutionary theory puts humans (or hominins) last, just as does the biblical story of Genesis.
Genesis 1 indeed puts humans last, but Genesis 2 puts them first. And Genesis 2 is the older story of the two. Maybe that explains why it's more in line with those folk zoologists? Genesis 1 (a poem, structured by the days of the week) was written later, possibly during the Babylonian exile, and may be more informed by the science of the Babylonians; it addresses not just the creation of the Earth and the creatures on it, but also the sun and stars, and the passage of time; topics that the Babylonians were very interested in.