Choice Or No Choice?

The selfish gene got me thinking of free will, if there is such thing as one. If we are genetically selfish then do we have a right or a choice to be kind and unselfish? “”our genes may instruct us to be selfish, but we are not necessarily compelled to obey them all our lives.”(pg3) notice the words all our lives, this sentence could be an explanation for selfishness, next time someone asks me to think of others I can simply answer my genes are telling me not too and I have to follow the path of evolution. For what I have read so far I believe this book is questioning our human existence, why is it that we tell ourselves that we are the smartest creatures of earth. Some say we have a choice, which is the thing that separates us from animals, but the book itself says that there is a relationship with our genes and our actions, (which we have no choice on our genes, being red-haired or blue-eyed) then we are compelled to follow our genetics therefore our actions. So I have to question the existence of a god, there can’t be such thing, as faith or destiny simply because we follow our genes path, and if there is a god it should be Darwin who developed his theory of evolution and human behavior “social Darwinism”.
Why do we drink cow’s milk and not zebra’s and why is it that we do not see a zebra drinking horse milk. We humans do everything so differently from animals, call ourselves unique and advanced; however we are the guilty ones for global warming, not a cow? So in the end did we drive global warming by choice or by genetics?
Are we stable creatures, “a stable thing is a collection of atoms that is permanent enough or common enough to deserve a name.” (pg 12) notice that we use the word stable for emotions, am I stable as a person, I am common and permanent and have a name. This is the first time I heard this definition of the word, when I use the word stable I think either of love or human emotions. “Sometimes when atoms meet they link up together in a chemical reaction to form molecules, which may be more or less stable.”(pg 13) love is not a choice it is chemical, and in love one is stable or not. If my parents got a divorce I could simply blame the fact that the molecules where not common enough to deserve a name. Moreover, people who say we have a choice at love, I think we do not I think love happens because It was meant to (by molecules off course not destiny) and people simply click, that is why you can’t force it but help it.
So do we have a choice? how many sides of evolution are they? Can this book relate to the common good? How should I act now?