Why Parenting May Not Matter and Why Most Social Science Research is Probably Wrong | Quillette

http://quillette.com/2015/12/01/why-parenting-may-not-matter-and-why-most-social-science-research-is-probably-wrong/

Based on the results of classical twin studies, it just doesn't appear that parenting—whether mom and dad are permissive or not, read to their kid or not, or whatever else—impacts development as much as we might like to think. Regarding the cross-validation that I mentioned, studies examining identical twins separated at birth and reared apart have repeatedly revealed (in shocking ways) the same thing: these individuals are remarkably similar when in fact they should be utterly different (they have completely different environments, but the same genes).3 Alternatively, non-biologically related adopted children (who have no genetic commonalities) raised together are utterly dissimilar to each other—despite in many cases having decades of exposure to the same parents and home environments.3
_- Steve