What is the origin goody-two-shoes

The origin of the phrase "goody-two-shoes" dates back to the 18th century. It comes from a popular children's storybook titled "The History of Little Goody Two-Shoes" by John Newbery. The story is about a poor orphan girl named Margery who goes from having just one shoe to becoming a wealthy and educated woman. Margery is known for her good behavior and constant smile, leading people to call her "Goody Two-Shoes" as a nickname. Eventually, the phrase became associated with someone who is overly righteous or excessively moralistic