Twin studies problem: https://www.psychologytoday.com/gb/blog/looking-in-the-cultural-mirror/201006/why-twin-studies-dont-separate-genes-and-environment https:/

Twin studies problem: https://www.psychologytoday.com/gb/blog/looking-in-the-cultural-mirror/201006/why-twin-studies-dont-separate-genes-and-environment https://www.psychologytoday.com/gb/blog/looking-in-the-cultu... The End of Violence: https://www.penguin.co.uk/books/454978/the-end-of-violence-by-slutkin-gary/9781911709121 https://www.penguin.co.uk/books/454978/the-end-of-violence-b...