Investing in local organizing is the most important way to build movement power—and it must be linked to influencing national politics. Alongside investment in organizing we need to see support for storytelling and strategic communications work, insight and evaluation and the generation of irresistible ideas that can shift whole systems and paradigms as well as change policy and practice in the medium term. Organizing has the following crucial benefits: provides people with a safe framework to meet other people across the community and to work together with them; gives people an opportunity to engage in political life in a way that other organizations don’t; develops skills and gives local people a chance to learn; and enables people to take part in a range of campaigns on regularization for irregular migrants, properly affordable housing, better community safety and access to living-wage jobs, among others. Movements that win: have the necessary infrastructure to support activity to happen at key moments, allowing them to prepare for and harness external events; are a well-developed ecosystem; and are cultivated over a long period of time and ready to be activated when opportunities arise. This report is focused on the UK but carries parallel lessons for the US.