By the early part of the 1800’s steam was the driver of all engines, the enabler of industry. The word stood for power and force and all that was vigorous and modern. Formerly, water or wind drove the mills, and most of the world’s work still depended on the strength of people and horses and other livestock. But hot steam, generated by burning coal and brought under control by ingenious inventors, had portability and versatility. It replaced muscles everywhere. Steam became the most powerful transmitter of energy known to humanity.
Fast-forward a little over 200 years and steam has been replaced by a more powerful and ‘intelligent’ force – robotic brawn and energy.