Knowing about the past cannot help people to make important decisions today.There are similarities and differences between the past and today, for example, some products of technology including cellphones and airplanes did not exist in the past. However, there is a relationship between them. As there are nature laws that have an effect on the things, it is valuable to learn the past in order to make better decisions today. As many things that happened in the past occurs today, it is of great importance to learn from the history. The law of nature does not change a lot from the past to today, thus having a knowledge about the law will help us a lot when making decisions. For example, in history classes, we learned the war history, such the first world war and the second one. Both of the wars destroyed many cities and made many people died. What we learned from the war class is that wars are bad things that we should avoid. Imagine if there are people who do not know the influence of wars and try to do something like this, it is a adversity for the world. Now, many developing counties are facing environmental problems including pollution. In the industrial revolution period, many European countries had these kind of problems, too. The reason why these problems appeared is that people try to make industries developing without considering environment. They poured the polluted water to the water and to the sea and make polluted air everywhere. Thus it should be avoided today. However, some people try to make money with regardless to the environment. Maybe they do not know the history. Considering if they know the fact and try to avoid it, the environment would be protected. Some experience from older people may help us a lot. For example, when I was young and I got a cold. My parents told me to drink more water. I asked them why I should drink so much water. They told me by drinking lots of water will help me to be healed. It worked. I think because my parents had in such situation before, they know how to deal with it. With the information given above, we could conclude that it is sometimes helpful for us to learn from history. However, sometimes history may misguide us about what to do. For example, the ex-richest person in the world Bill Gates gave up to study from Harvard University and established a company. By deciding this, he set up his company Microsoft and earned a lot of money. When some people knows this, they may come up with an idea that not going to school can make us rich. Then they may choose to give up studying and choose the same way as Bill. However, the consequence of them will be that they will have nothing. The reason for Bill to success is that he found the opportunity of personal computer and he also had a good knowledge. This kind of way to success does not work on everybody. Admittedly, it is possible that we may be misguided by the past, we have to learn form the history with critical thinking. We have to absorb the precious ones and discard the useless things. I think by learning a good knowledge of history, we can make wise decisions when facing the problems that we met before.