You have worked for decades in philanthropy and you've figured that we're not doing it the right way - building these organisations with large staff bases and their own theories of change, and funds that keep going for perpetuity. You want to see philanthropy done differently, or maybe you're already doing it differently, and now you want to take it to the next level and join us as a Custodian to build a coalition of 100+ philanthropies that decide to spend-down over the next decade so we can free up the resources required for people working on systems change to truly effect the change that is required in this critical design decade for humanity!