Explain why it was controversial and socially unacceptable for Archduke Franz Ferdinand to marry Sophie Chotek

The Bessemer process provided a cheaper and more efficient way to produce steel, which along with the internal combustion engine and use of electricity to power homes as well as factories spurred the second industrial revolution.

The improved steel production which was possible due to the use of bessemer process, allowed the increasement of cheaper steel supply, thus making possible to build more railroads, so trade of more profitable goods was enabled, which was previously too costly.

The internal combustion engine provided a new cheaper source of fuel, since  coal was expensive and difficult to obtain.

Electricity had a tremendous impact during the industrial revolution, since prior to its use people had to use water and steam power to make their machines work among other obvious applications in modern times.