This document discusses several key points regarding social policies and mental health: 1) Mental health is shaped early in life, with half of all mental disorders starting before age 15. Stable home environments, nutrition, stimulation and parenting can lead to good developmental outcomes. 2) Many determinants of mental health are outside the health sector, such as family struggles, economic hardship, low education, and social exclusion. 3) The Mental Health in All Policies (MHiAP) approach aims to systematically consider health implications across sectors to improve population health and equity. Key policy interventions discussed include parenting support, access to childcare, employment programs, and poverty alleviation.