The answer is, To argue for, there's the obvious, which is that the colonists didn't
like their lack of voice within British Parliament. They also didn't
like how Britain was treating other colonies, what would become Canada
for instance, with similar laws and codes seen in the US colonies. You
could also argue that it was a more financial decision, as the taxes
placed upon the colonies and the restrictions on trade were hurting
American businesses. Honestly, an argument combining the two would
probably be more rounded.
With the influx of people to urban centers came the increasingly obvious problem of city layouts. The crowded streets which were, in some cases, the same paths as had been "naturally selected" by wandering cows in the past were barely passing for the streets of a quarter million commuters. In 1853, Napoleon III named Georges Haussmann "prefect of the Seine," and put him in charge of redeveloping Paris' woefully inadequate infrastructure (Kagan, The Western Heritage Vol. II, pp. 564-565). This was the first and biggest example of city planning to fulfill industrial needs that existed in Western Europe. Paris' narrow alleys and apparently random placement of intersections were transformed into wide streets and curving turnabouts that freed up congestion and aided in public transportation for the scientists and workers of the time. Man was no longer dependent on the natural layout of cities; form was beginning to follow function. Suburbs, for example, were springing up around major cities
Desegregation is the ending of a policy of racial segregation.
De-segregate.
The most significant clue that helped was the Rosetta Stone, an inscription in three scripts.
Answer: No other European power had established a presence in the area.
In the early 19th century, Russia had already established some colonies in Alaska, securing its presence in America. Russia was expanding East, across Siberia, and eventually started moving south, until it reached Northern California.
Americans who were involved in the sea otter business proposed some joint hunting expeditions with Russian supervisors and Native Alaskan hunters to hunt seals along the Californian coast. These expeditions allowed the Russian parties to observe large stretches of uncolonized land. This led to the conclusion that a Russian settlement could be established in California.
