Because of the century, people have decided to start driving a car ? Do you think that the admiration for the technical progress was decisive? Sure, but not alone. Then, the cost of petrol? Maybe, but not all. A that time, the European colonial empires did not care much about royalties to the sheiks. Gasoline was cheap, but they only bought the grocery store. The queues at the weekend had not seen.
The medical and scientific research were factors outside the technical and economic, but equally important. In 1884 two Italian pathologists, Antonio Carle and Giorgio Rattone University of Turin, the understood bacterial tetanus . As always, this was a serious problem for all humanity. We got sick of tetanus infect with minor injuries from knives and farm tools. Tetanus is caused by Clodistrium tetani spores. In practice, this bacterium can dry out the cells that become spores just . Humidity and temperature just make it active again. Because normally resides in the intestines of horses, was normal on the roads there were many Clodistrium tetani spores. For the reasons that you can easily imagine.
The enthusiasm of those years of scientific advances made for interesting articles on Microbiology, the learned bourgeois liberals followed the conference of scientists. He grew up indignation against bacteria and germs. Physicians commended hygiene and cleanliness. In short, it formed an opinion, a belief, just to another, it was better to remove the horses from the city. The car arrived at the appropriate time.
will this happen? For my part, yes. But I remember a child in the 60's, a farmer , cheerful and intelligent, which passed the house with his mule. He stopped along the road to greet those who knew. Motorists already no longer stop.