What is the purpose of a human society?
The mission of most human societies is the safety and well being of our animal counterparts, whether on a farm or inside a home. This is done through measures of animal cruelty prevention and animal advocacy. On the national level, groups work on the research, education, and assistance to smaller, local shelters. This is done through community outreach, working directly with schools and libraries, and money-raising campaigns.
Are the national and local groups part of the same organization?
Generally, no. Local organizations are run mostly by volunteers and donations and deal with animal population issues in that one community or county. Larger, national groups such as the Humane Society of the United States, or the ASPCA can financially support these groups from time to time, but have no direct hand in how they are run or operated. Local groups depend heavily upon the community, adoption campaigns, and private donors. Some areas have breed-specific rescue operations and will work nationally to rescue that particular dog, cat, or bird from a facility that is overcrowded.
Where will my money go?
While there is no way to know for sure where your particular funds will go, you can monitor the finances of non-profit organizations to see how they are spending their donations.