We now live primarily in cities giving protection from other predators. We grow our own food rather than having to seek it out, and we enjoy the benefits of medicine with a resultant doubling of life expectancy over just a few centuries. Thus, the reaction to that success is partly responsible for the rise of eugenics as promoting the discrimination of people. Humans playing God can have devastating effects, because people do not understand the total ramifications. Human beings are the ultimate source where religion and science can be bridged.
Humans are biological machines having instincts, emotions, and intelligence.
These chemical processes predetermine the world. However, free will can co-exist in this world. What makes free will free is that we make the choices, according to the knowledge, preferences, and biases that make us who we are. People cannot know when or if such events will happen. But even if we are morally weak today, there is hope as long as some influences within us keep looking for ways to improve.