em - Twin studies show beyond all doubt that so much of our interests and abilities are down to our genes.
Have a read at 'The Blank Slate' by Steven Pinker; Nature Via Nurture by Matt Ridley; 'We are our Brains' by Dick Swaab. They are all on my library shelf. None of them are the opinions of one scientist; they all describe a wide range of studies and deal with objections to the hard science by ideology-led academics working in humanities.
Another book on the topic that I haven't read yet is 'Blueprint, How DNA Makes us Who We are' by Robert Plomin