In the past, things were really uncomfortable. For example, there was not car or an airplane for people to commute, thus resulting in a delay in a transportation or a meeting. Many people for this reason missed a really important opportunity and finally failed to succeed. Food was then sent from one region to another, but this slow transportation system made food decay, so their health was not as good as nowadays people.
In Korea, there are many things that other countries may follow. Korea's Kimchi is very famous for its contribution to health. Also, Korea's Taekwondo might be prevalent in the world. It is selected as a sport played in Olympics. Korean's respecting attitude to the living creature is also the good thing to follow. Many countries are now following these things so they can solve problems easily.
In the past, there were no computers. Therefore, people had to memorize and calculate by themselves. Also, they had to collect information on their own. In this sense, they were very diligent and sincere. However, nowadays, an abrupt advent of computer brought about many changes such as easiness in the transportation of information and not having to move to collect the information. Many believe that computer made human's life easier and quicker, which is in some part correct.
In the past, there were no televisions, radios, let alone the cell phones. At that time, there were no problem related to the cell phone and everyone lived really happily. However, nowadays, an abrupt advent of the cell phones is giving off numerous arguments. Some say students should be allowed to use the cell phone in the school premise in preparation for unexpected emergency such as robbery while others persist in the ban of cell phones in the school.
Some say book has the most concise, true, genuine information about our behavior, facts, or even our life and the future. They say the information learned in books is definite and absolute and no one can beat it. But I truly disagree. Book is what human itself made. As books can never contain the information larger than human's(because it was made by humans), books cannot overcome human's knowledge. Also, experience is the beset teacher. Furthermore, book cannot decide what we should do under whatever situation.