The American Society of Civil Engineers is a group of people who work together to make sure that buildings, roads, bridges, and other big structures are safe and built properly. They study things like how materials behave, how the ground works, and how to design buildings that can withstand things like earthquakes or big winds. They also help come up with new ideas to make buildings and roads even better and safer. The society also helps people who want to become civil engineers by giving them resources like books and classes to learn from. Think of them like really smart friends who are really good at building things and want to help keep everyone safe.