If you are writing an essay about Henry Ford and interchangeable parts, then this is an example of how your introduction and first paragraph could look like:
Henry Ford was an American visionary. There are so many aspects of industry that will never be the same because of Ford's impact in the industry. Ford was responsible for the development of many industrial areas in the United States. He was also responsible for the introduction of innovations like interchangeable parts and the assembly line. (THESIS). I will first discuss the use of interchangeable parts.
Although Ford was not responsible for the invention of interchangeable parts, these are often linked to him because of his use of such parts in mass production. Ford used interchangeable parts in his Model T. Every single one of these cars used identical parts. This meant that the cars could easily and very quickly be produced in an assembly line. It also meant that cars were easy to repair.