The author of any textbook will say that there have been three major industrial revolutions. The first industrial revolution was steam industrial revolution, the second one based on coil and the production or major machines with the third happening recently where automated robots have starting to take over different jobs.
The Mauryan empire controlled most of the trade in northern and central India, they had captured dozens of territories and had even more in their sphere of influence, due to this trade generated massive amounts of gold and precious minerals in their coffers.
