So much happened at the end of the 19th century and the beginning of the 20th century.  Things that we take for granted today.

With the advent of motorcycles, automobiles, one must remember that at that time, outside of the cities there were mostly poor roads, and few or no filling stations or service stations available for motorists. This had to be built which spurred the development of trucks and all types of roadbuilding equipment.

Likewise, for the airplane industry.  The transportation of people and goods in this era (1850s-1950s) has evolved in so many different ways.  And the modes of transportation we take for granted today in most cases didn’t exist in their present forms before this time.