In America, this problem has reached epidemic levels. According to the Centers for Disease Control and Prevention, only Washington D.C. and Colorado had an obesity rate of less than 20 percent in 2009. The CDC also reports that obesity has risen exponentially in the past 20 years. A good angle for this topic would be to explore that same time frame and examine possible causes.
Regarding media and its relation to social woes, there is definitely a cause and effect scenario occurring. This is a great topic to select, because it is not always clear which is causing what. Does the media cause the ills, or is it merely reporting them, and the cause lies elsewhere? If so, does the media exacerbate matters with sensationalism?
Computers have had and continue to have a profound effect on business and society. The way we work, store information and even the way we meet people has been affected. Your essay can have a broad focus on the effects of the computer revolution, or you can simply focus on one aspect, such as the cultural changes related to computing. Given that the modern world is still in the midst of the revolution, there is also the option of observing the current landscape and projecting future effects.
Addiction is a sometimes touchy subject with the American public, as there are conflicting views on addiction and its causes. One school of thought preaches that it is an unpreventable, physiological disease, no different than sickle cell anemia or lupus. On the other hand, a good number of people see it as a character flaw or lack of will power. Explore both angles in your essay to decipher whether or not it is nature or nurture that is the culprit.