I believe the people who started agriculture, and domesticated at least some animals, probably had a special "gift."
Especially with agriculture, I believe it took somebody who was really immersed in it to make agriculture practicable. I believe there must have been many, many failures before ultimate success. Some of these "scientists," it can be speculated, had, say, domesticating wheat as a "special interest."
If one researches wild grains, and compares them to their domesticated counterparts, one would see a great difference. The original "maize/corn" was maybe an inch long at the most. Now, corns-on-the-cob can exceed one foot in length.