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How much do our genes determine about our lives, and could they influence traits like risk-taking, antisocial behaviour or even violence? Ian Sample talks to Kathryn Paige Harden, a behavioural geneticist and professor of psychology at the University of Texas at Austin who studies how genetic factors shape human behaviour. In her book Original Sin she explores how nature and nurture combine to influence our likelihood of committing crimes, and asks whether the ‘cause’ of our actions matters for how we think about culpability

In September 2025, Melbourne wellness influencer Stacey Warnecke decided to give birth at home, free of all medical help. No one else was present when she went into labour except her husband and a woman named Emily Lal. Warnecke later died in hospital. Lal, who describes herself as a ‘birth keeper’, had no formal medical training and had taken an online course offered by the Free Birth Society – a multimillion-dollar business that trains unregulated birth support workers. Warnecke is one of a growing number of women choosing medically unassisted births, known as ‘freebirths’, and non-medically trained supporters for their pregnancies. Unpacking why is a key question being considered by a coroner, Therese McCarthy. Reged Ahmad speaks to the medical editor, Melissa Davey, and investigations correspondent Sirin Kale on the inquest so far and what we know about the Free Birth Society

Jenny Kleeman investigates ‘Biotech Barbie’ Cathy Tie, the controversial entrepreneur hoping to revolutionise human reproduction by letting parents edit their embryos

Tony Barry and Barrie Cassidy examine a big week in politics. Will Zali Steggall and Allegra Spender prove successful with their new centrist political party? Is Angus Taylor in trouble after a week of stumbles responding to One Nation policies? And what lessons should Anthony Albanese learn from Keir Starmer’s downfall?

This week, Anthony Albanese’s UK counterpart, Keir Starmer, succumbed to mounting pressure and resigned as prime minister. A number of comparisons have been made between the pair, including resounding election wins followed by a decline in the polls while insurgent rightwing parties gained ground. Josephine Tovey speaks with Mike Ticher, Gabrielle Jackson and Guardian Australia’s international editor, Virginia Harrison, about how Albanese can avoid Starmer’s fate