Humans and millions of other species are facing a near-term existential threat: Anthropogenic ecological overshoot. Climate change is just a single symptom of ecological overshoot, yet climate change is receiving significantly more of a focus for intervention. In our recent paper we highlight that even if humanity were to successfully address climate change with the myopic strategies currently on the table, it would worsen ecological overshoot in the process due to the physical, resource intensive nature of the interventions proposed. Not only this, but the proposed solutions look to enable the continuation of the existing growth paradigm which brought us ecological overshoot in the first place. In our paper, we demonstrate that overshoot is driven by a modern crisis of human behaviour, one we have named the 'Human Behavioural Crisis'. In this talk I will explore overshoot and the human behavioural crisis as an anchor and critical intervention point for addressing overshoot. I will also explore prioritising psychological interventions over physical ones, and the findings of our Overshoot Behaviour Lab.