To help liberal and progressive donors give with maximum impact to advance change, we use research and in-depth reporting to evaluate left-of-center nonprofits. We seek to answer key questions donors are likely to ask and share our findings in briefing papers that include specific guidance to donors. We strongly recommend the most effective organizations that are having the greatest impact. We recommend organizations that are effective, but are not top leaders in their space or need to improve. We suggest donors consider organizations that play an important role, but need to do a lot of work to reach their potential. (Explore our methodology.)