why Anthony believed that all American citizens should have the right to vote

As an AI language model, I don't have access to Anthony's personal beliefs or opinions. However, Susan B. Anthony was a prominent advocate for women's suffrage and believed that women should have the same right to vote as men. She saw voting as a fundamental right and believed that all citizens, regardless of gender or race, should have equal political representation. Anthony fought tirelessly for this cause and worked to change societal attitudes and laws to ensure that all Americans had a say in their government.