Here's a simplified timeline:
* Ancient Greeks and Romans: Had basic understanding of steam and its power, but no practical applications.
* Hero of Alexandria (1st Century AD): Developed the first known steam-powered device - the Aeolipile - which demonstrated the principle of steam propulsion.
* 17th Century: Denis Papin created a "digester" that utilized steam pressure, laying the groundwork for later steam engines.
* 1698: Thomas Savery patented the first practical steam engine, designed to pump water out of mines.
* 1712: Thomas Newcomen developed a more efficient steam engine, the "atmospheric engine," also used for pumping water.
* 1769: James Watt made significant improvements to Newcomen's engine, introducing a separate condenser and making it much more efficient. Watt's improvements are often considered the foundation of modern steam engines.
Therefore, it's more accurate to say that the first steam engine was a result of gradual development over time, with contributions from multiple individuals. Each inventor built upon the work of those before them, eventually leading to the powerful and versatile steam engines that revolutionized industry.