Recent scientific discoveries have undermined the notion of moral responsibility. Our behaviour is determined by chance factors such as our environment, our genes, our upbringing, neurological events, and our balance of neurotransmitters and hormones. Robert Sapolsky talks about the twinkie defense. The story of Mr Oft. [[A brain tumour causes paedophile behaviour]] The fruit fly experiments of Seymour Benzer show that genes determine much of behaviour. (Time, Love, Memory) Twin studies show that genes determine many of our life choices. Even how we reason about morality shows an inherent bias. (Joshua Knobe's experimental philosophy question about inadvertent wrongdoing.)