Question

What sparked the development of the Second Industrial revolution?

Answer 1

The development of a better way to produce iron cheaply.

Answer 2

The Second Industrial Revolution was based in many technological developments but what really sparked it was the widespread use of such technologies by a great number of people; this widespread use was based in turn on two main developments: railroads and telegraph; a little bit later, the addition of telephone and the wide use of oil and all its sub products.