The Royal Society for the Prevention of Cruelty to Animals (RSPCA) is the oldest and largest animal welfare charity in the world, founded in 1824 in England and Wales. It operates primarily through voluntary donations from over 500,000 supporters, raising more than £100 million annually. The organization employs over 1,600 staff and more than 300 inspectors, supported by volunteers across various hospitals, centers, and local branches, all without government funding. The RSPCA rescues, rehabilitates, rehomes, or releases hundreds of thousands of animals each year. It investigates allegations of cruelty, prosecutes severe cases, and provides care and advice on responsible animal ownership. The charity also conducts educational programs to promote kindness towards animals from a young age. Through its RSPCA Assured scheme, it enforces higher welfare standards on participating farms and industries. The RSPCA continues to advocate for policy reforms and global changes in attitudes towards animal welfare, marking its 200th anniversary in 2024.