There are a multitude of reasons why cultures change. Some examples include innovation, diffusion and revolution. Although this is not a complete list, history shows that these factors have important implications on culture.
Oil has slowly depleted as an available resouce, there for the price has risen because it's scarcity.
Jean -Bertrand Aristide was the first democratically elected president of A) Haiti.
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The American Party, also known as the "Know Nothings" used the issues of their day to advocate against immigration, specifically the massive influx of Irish and German populations, instead supporting nativism. Their platform was anti-catholic, argued immigrants from Europe should have a longer period of time before being made American citizens and argued these new immigrants were taking jobs from Americans in need. The main goal of the movement was to limit immigration, instead keeping the United States "native" and free of European immigrants.