GRE素材精华：POOH百宝箱.doc

POOH百宝箱历史类之一 Why study history The importance of history in explaining and understanding change in human behavior is no mere abstraction. Take an important human phenomenon such as alcoholism. Through biological experiments scientists have identified specific genes that seem to cause a proclivity toward alcohol addiction in some individuals. This is a notable advance. But alcoholism, as a social reality, has a history: rates of alcoholism have risen and fallen, and they have varied from one group to the next. Attitudes and policies about alcoholism have also changed and varied. History is indispensable to understanding why such changes occur. And in many ways historical analysis is a more challenging kind of exploration than genetic experimentation. Historians have in fact greatly contributed in recent decades to our understanding of trends (or patterns of change) in alcoholism and to our grasp of the dimensions of addiction as an evolving social problem.One of the leading concerns of contemporary American politics is low voter turnout, even for major elections. A historical analysis of changes in voter turnout can help us begin to understand the problem we face today. What were turnouts in the past? When did the decline set in? Once we determine when the trend began, we can try to identify which of the factors present at the time combined to set the trend in motion. Do the same factors sustain the trend still, or are there new ingredients that have contributed to it in more recent decades? A purely contemporary analysis may shed some light on the problem, but a historical assessment is clearly fundamental梐nd essential for anyone concerned about American political health today.History, then, provides the only extensive materials available to study the human condition. It also focuses attention on the complex processes of social change, including the factors that are causing change around us today. Here, at base, are the two related reasons many people become en