What made Henry ford make the first car?

Henry Ford didn't make the *first* car. Many inventors and companies were building automobiles before him. What made Ford stand out was his development and implementation of the assembly line and the consequent mass production of affordable cars. This made cars accessible to the average person, which revolutionized transportation and American society. He wasn't the first to build a car, but he was the first to build them cheaply and efficiently on a large scale.