We are not merely animals,and to assume otherwise is ontological reductionism.
It is a continuity. We cannot suddenly stop being animals and become something else. There are no discrete stages.
But the developmental process that slowly but surely reduces certain traits and increases certain other traits is obvious. It has been going on for thousands of years.
Religions, spiritual theories, philosophies etc. have all been trying to understand and aid this process in various ways.
Whether we call it a spiritual process or a religious objective or simply being more civilized....doesn't matter at all. It is happening and will continue.