The Humane League (THL) is a nonprofit organization that works to reduce the suffering of farm animals through online advertising, Meatless Monday campaigns, and corporate outreach. It creates reports through the Humane League Labs, which evaluates advocacy presentation and methods and publishes them as reports. One of these reports includes a study showing how distributing leaflets at colleges affects diet change. It was founded in 2005 in Philadelphia.
It has been listed as a top charity by Animal Charity Evaluators since August 2012, with the most updated review in December 2015. The other top recommended charities by ACE are Animal Equality and Mercy for Animals.
THL has been one of ACE's top recommended charities since ACE's inception in August 2012.
ACE published an updated and more detailed review of THL in December 2015. In the review, ACE estimated that for an average $1,000 donation, THL would spend the marginal money as follows:
Based on these estimates and their estimates of the efficacy of each of these modes of advocacy, ACE estimated that every dollar donated to THL saved the lives of 13.4 animals, higher than any comparable charity that they had comparably clear data on.
ACE estimated that THL could use $190,000 in funds from ACE-directed donors for the 2015 giving season.
In December 2014, Animal Charity Evaluators published its first detailed review of THL. According to the review: "THL’s most impressive accomplishment for us is not through any one of their programs, but through their overall outlook and approach to advocacy. Among animal advocacy organizations, they make exceptionally strong efforts to assess their own programs and to look for and test out ways of improving them. Their success in applying these techniques to their online ads program, and their publication of their research through Humane League Labs, has shifted the outlook and programming of several larger advocacy organizations toward finding the best ways to advocate for animals." On the flip side, ACE raised concerns about THL not valuing transparency highly enough, and justifying local offices simply based on whether they brought as much money as they spent, rather than relative to counterfactual uses of money.
ACE estimated that THL would spend a marginal $1,000 as follows:
ACE recommended moving $50,000 to THL but said they believed the organization was capable of absorbing up to $270,000.
Partly as a result of the Animal Charity Evaluators recommendation, THL has been viewed positively in the effective altruism movement. Raising for Effective Giving lists THL as one of the charities it recommends giving to. The Chronicle of Philanthropy cited an example of an effective altruist who chose to pursue a career in finance so that he could pursue earning to give, donating large sums to The Humane League to help it spend more aggressively in pursuit of its goals.