In the early 1900s it was the invention of electric powered trolleys. Many cities (e.g. Los Angeles, Chicago) built extensive electric trolley systems connecting the factories, schools, residential areas, etc. and extending into nearby small towns. This permitted the first major expansion into the "suburbs" as people living in the city centers moved to existing small towns that the trolley lines serviced as they presented more desirable places to live. The second major expansion into the suburbs happened as new suburban construction began around these trolley lines.
It was really not until after WW2 however that the biggest wave of expansion into the suburbs began as the production and sale of new cars was again permitted and the car and oil companies buying up trolley lines across the country so they could scrap them to force people to buy cars if they wanted to get around at all. Now the construction of suburbs was no longer limited to the areas around trolley line systems.
Unfortunately today we need to rebuild electric trolley systems and add new high speed mass transit systems to help minimize the massive traffic jams and high accident rates created by so many people driving their own personal cars to work and school!
The growth of malls and supermarket
Similar skills led to their development.
Following World War II, the veterans of the foreign wars came home to an economy recovering from the greatest depression in American History. Awaiting for these veterans was the GI Bill that will assure them free education, low cost loans for businesses, homes and automobiles even as the country was still involved in racial strife. Industrialization was far exceeding agriculture. Profits on the farms were dropping as the value of their land increased. This led to farmers selling land to real estate developers. The baby boom has started and people were looking for more space. All these ingredients led to an exile from the cities to the suburbs. In fact, the definition of suburbs is the outlaying town or county of an urban center. In 1947, William Leavitt started the "housing boom" in the suburbs by buying farmland and building "cookie cutter" homes on Long Island, NY. The new homes were sold at a price of $5,000-15,000. At the same time, Robert Moses in New York, started building highway systems where one can travel to the urban center from the suburbs quickly. At least in theory this was to occur. What actually happened, suburbs led to a "white" exile as the cities began to crumble. The apartments and brownstones in the cities became slums, and the infrastructure began to crumble. The monies needed for the cities to maintain, have left for the suburbs. Many African-Americans were left out of the suburb move due to racial preference. In short, the beginning of the suburbs was racially and economically motivated. Today, the suburbs are suffering along with their urban brethren.
People and their windows
cscope iz wakk
Africa
Africa
Europe was led into warld war1.
Shorter workdays
I believe the answer is type writers.
the building of a railroad through Texas!
(The word geneses is the plural of "genesis" meaning creation or beginning.)The development of integrated circuits led to the geneses of many new consumer products.The early 1900s saw the geneses of several political movements.
Imperialism
The consolidation of mills and the trend toward facilities with greater capacities led to the creation of giant corporations such as Pillsbury Co. and General Mills, Inc. Millers began offering a wider variety of products
grow in car sales
Cars led to the development of suburbs.
The Railroad allowed for coal shipments. Coal and slag (impure coal) led to steel mill operations. Steel mills led to all kinds of industries.