Who is Immanuel Kant from The Problems of Philosophy and what is their importance?

The Problems of Philosophy is not about any one person. Instead, it is about the great philosophical problems. However, by way of introducing these problems, Russell discusses a variety of important philosophers. He seems most influenced by Immanuel Kant (1724-1804), an 18th-century German philosopher. Kant is perhaps the most influential philosopher of the modern period, whose works continue to be deeply influential to this day.