Can you prove that it is "terrible science"? What is the origin of intelligence according to you, if not genetic? Is it the environment? How do you explain that biological and adopted kids vary in intelligence despite growing up in the same environment? How do you explain similar levels of intelligence of twins or siblings separated at birth and who grew up in a different environment? How do you explain that the vast majority of successful people today had a successful ancestor? How do you explain the persistence of social class levels across generations despite the variability of net worth and environment, if not for genetics? How do you explain the persistent socio-economic differences between certain groups across generation despite that they share the same culture? How do you explain the variation in the IQ distribution across different populations living in the same country, if not for genetics?