Not exactly. In Russia, they conducted an experiment with foxes that lasted for several decades (you may have heard of it). The gist of it was this: they took a group of foxes and divided it roughly in half. The most evil and aggressive were put into one group, the rest, more kind, into another. Then, from each litter, they began to select the good ones separately, and the evil ones separately. And so, over the course of several decades, they selected the kindest and the most evil. As a result, they got foxes that were super loyal and affectionate to people and to each other in one group, and super evil and aggressive in another. Then the scientists put newborn evil foxes into a litter with good foxes. When they grew up, they remained as evil and aggressive as their biological parents, despite being surrounded and raised in an environment of good foxes. Then the scientists took the embryos of the evil foxes and put them into the good foxes. The result was the same. Conclusion: Genetics decides everything. The role of upbringing and environment is greatly exaggerated.