an essay about the 21st century At the beginning of the 21st century, people have made a huge amount of progresses in many fields, such as science, economy and politics, as a result, our lives are consequently changed in many ways, and some people think that we are being given opportunities to do some positive changes in this century. On the one hand, along with the continuous development of the world, good changes would be made without any doubt. In science, many high technologies would be developed and applied to society and civilian, and people would benefit from that. For example, some incurable diseases could probably be cured in the next few years. Moreover, businesses between countries become deeper and deeper, and people of different countries would have more chances to choose better productions than ever. Besides, more and more countries decided to unit to do things together rather than fight against. On the other hand, there would be some negative changes that probably be ignored. People are so rely on those high-tech productions which could facilitate their daily lives that they could not solve problems by themselves any more. Besides, the changes of economy and politics are not always good, more and more people buy goods that they completely don’t need as they are confused by advertising company. In my opinion, it is partly true that this century is providing us opportunities to make some positive changes. Meantime, negative changes would certainly come with those good things. What we can do is to keep sober and to do more positive changes as soon as possible. At the same time, we should also make some plans to try to prevent bad result caused by negative changes from people.