Who is the American society who help prevent animal cruelty from stopping?

Every State in the United States has their own Animal Cruelty offices and places.

That stop animal cruelty. But I have included a website that shows you the History of The Society for the Prevention of Cruelty to Animals Which was actually founded in 1866 that is a long time!

Today they are based out of Washington, DC and are called: Humane Society of the United States. (HSUS)

With 9 regional offices and 8 affiliates and one arm internationally.

Here is the website where I got the information from:

http://animals.howstuffworks.com/animal-facts/humane-society1.htm