During the earliest days of the entity now called the Humane Party, this organization had three alternate names: the “Vegan Party”, the “Abolition Party”, and the “Humane Party”. All three of these names are now, always have been, and always will be accurate ways to refer to the Humane Party.
For example, the Humane Party is indeed the Vegan Party, because it is the first (and currently only) U.S. political party that requires all candidates, officers, and board members to be vegan. Moreover, the Humane party is indeed the Abolition Party, because it is the first (and currently only) U.S. political party committed to abolition of slavery.
Notwithstanding the accuracy of all three names, the Humane Party eventually chose the “Humane Party” name as its formal name because the word “humane” encompasses many concerns that fall outside of the commonly understood scope of the word “vegan” or the word “abolition”. For instance, the Humane Party’s leadership in areas such as civil rights, health care, economic development, and national security falls more comfortably within the generally recognized ambit of the word “humane” than that of the other two choices.