German idealism is a philosophical movement from the 18th and 19th centuries that was based on the idea that we can understand the world by understanding our minds. It was led by figures like Immanuel Kant and Friedrich Schelling, who believed that the world was basically constructed and shaped by our own ideas and beliefs. They believed that since we construct the world, we have control over it. We can use our own minds and thoughts to make the world better. German idealism focused on bringing together different types of knowledge and ideas, like science and philosophy, so that our understanding of the world is more complete.