Engaging systems of finance enables leaders of international non-governmental organizations (INGOs) to access new strategies for social change and invites collaboration with new sets of people and institutions. While INGOs are our key audience for this Blueprint, we see the lessons as highly relevant for a wide array of organizations and individuals, such as other forms of civil society organizations, the philanthropic community, corporations, and donor agencies. In addition, investment professionals, while not the primary audience, can make use of this Blueprint to think through how to effectively collaborate with INGOs and other social change organizations.