The twentieth century technology developed rapidly. Communications technologies, transport, the spread of education, employment of scientific method and research investments contributed to the advancement of science and modern technology. Some technologies such as computers developed so quickly as they did partly because of war or threat of them, for there were many scientific advances associated with military research and development, such as computer technology. The radio, radar and sound recording were key technologies that paved the way for the invention of telephone, fax and magnetic data storage. Improvements in energy technologies and engines were also huge and include the use of nuclear energy, progress resulted from the Manhattan Project. Using computers and laboratories, modern scientists have developed recombinant DNA.

Many sociologists and anthropologists have created social theories concerning the social and cultural evolution. Some, like Lewis H. Morgan, Leslie White and Gerhard Lenski consider technological progress the main factor of development of civilizations. One topic in the current debate on science and technology is to determine that both have served to shape modern societies and transform the traditional ones. Scientific advances in technology have also dramatically altered the relationship of man with nature and the interaction between living things. Science and technology are given high values in today's society. Science and technology cannot be studied outside the social context in which they occur. Between science and technology there is a clear state of symbiosis, in other words, living together for mutual benefit. Although the effect of both acting together is infinitely superior to the sum of the effects of each acting separately. Yet, before these developments that could not even imagine the highways of the past begin to emerge more and more serious questions about the place that it is science and technology in our society, and also a record as not can ignore such problems. I read a phrase written by Albert Camus, which was very appealing to me, reads as follows:

"The seventeenth century was of mathematics, the eighteenth century the physical sciences, the nineteenth century of biology and the twentieth century is the century of fear".

Is it true?, Might say yes, because science and technology have been so boom, both developing today many fear that science and technology come to destroy the world. Many people see it as follows, how many people have died in car accidents?, If science and technology have not created had never occurred. But leaving behind the other side of the coin, how many people were saved thanks to the auto transport? How quickly move from one place to another?, If they had developed these inventions. What unites science and technology with society are the needs and desires of society. Many people consider science as a threat, not only in our time but for many years, is a typical case of Galileo who was condemned by the Pope, since it believed that its new method of considering the truth was a great challenge to traditional authority. Although many believe this is because society does not tolerate that about which no information or simply can not comprehend. Today, technology is part of the life of all societies. Science and technology are adding to the social and political will of societies to control their own destinies, their means and power to do so. Science and technology are providing the society with a wide variety of options as to what could be the fate of mankind.

The twentieth century

Despite all the hype that took place last year to the supposed conclusion of the millennium, we know clearly that on 31 December this ends this cycle of thousand years of human history. Shortly before the end of 1999 there were many lists, hierarchically organized progress of mankind, great men, in short, everything you wanted to grant such magnificence to the false conclusion of 10 centuries, but I would like to take a look at what could be the hallmark of the twentieth century.

Among the scientific and technical advances, no doubt, is to choose. From antibiotics to television, from the usual computer invades our lives until the last redoubt and the space race and nuclear power. Anyway, I know that I pass over many important inventions, but I conclude with the example of the chilling biogenetic and clones that threaten to change the very psychology of humans. Many will say that the main feature of the century ending falls in the area of scientific development. Others will say that, as almost always has been, the dominant vein is the desire to make war. And, if it conflagrations in this century we have the two world wars, with its millions of dead and for flushing of the species, the horrors of the Second. Now I want to stop and bring up the subject of a spot of salmon caught in a fisherman's net. The fish, living at home and without the slightest suspicion that their lives are threatened, swim completely identified with the peace that the routine of their lives gives them. Suddenly they are caught up in something incomprehensible, never experienced, which prevents them from swimming. They begin with despair, to seek an escape from what's up helplessly into the blinding light that always see but never tempted. Finally are lifted out of the water and lying on a hard surface. Flutter while dying from asphyxiation. Eventually die without knowing where or why they came so strange that purpose. The experienced by the salmon is exactly what we have seen millions of people over the last hundred years. What characterizes the twentieth century is the dismal existence of the shameful existence pursued and the pursuer. What in past centuries was limited largely to wars that although ideologies masquerading as religion or, at the bottom were struggles for economic domains, in our century is a real persecution by ideology, race, color, creed or sex. The specialization of the persecution reached such levels now that everyone reading this article at some point in their lives have been persecuted and many, even now, still are. The massive persecution of human beings began with the fateful revolution of October 1917 with the ominous Lenin at the head, followed by Stalin.

The hunting of Jews reached its peak in the Second World War and, at the end, comes a world communist whose credo is precisely the expertise of the pursuer at the expense of the persecuted. Today, despite the collapse of the communist bloc ridicule, persecution is still the worst plague of the century. The case of Cuba is exemplary. What may need a man like Castro to his age and after so many years to exercise power without limits? Nothing needs nothing, but still standing despite the persecution that may well retire to see the time pass until death overtakes it full of honors that he knows false, but in peace and well guarded. This century, no doubt, is a constant race of someone who runs away and another game, often under the complacent gaze of neutral spectators who, not touching them-at least at that moment do not care about the misfortunes of others. The human being must set course toward the elimination of persecution. For that, we first must understand that long is mired in error to pursue. When that equation changes, change the destiny of humanity. The only tool I now hand to improve this situation is in the ideological field: promote to the full the Declaration of Human Rights United Nations and seek ways to generate wealth to exterminate poverty. And I must be very unwise because in most places, human rights activists are part of the legion of the persecuted. We must strive to leave a human legacy and begin the new century with emphasis on the mad race to the chase.

A technologically advanced society

In the twentieth century, transformations in the world have been very fast: a break with this has been much stronger in our time. Culture and art reflect the changing character. It is therefore inevitable talk of a crisis and a profound cultural renewal. At present, humans cannot but depend on scientific and technological advances. Research has reached large dimensions and have an impact economically and socially. So, we say that we are experiencing a revolution in science and technology. The consequences of progress has caused a great impact on daily life. Not only has there been a surprising number of inventions, but there have also been profound changes in the relationship science, technology and society. In medicine and the health sector, we have invented an infinite number of medications and surgical procedures: biotechnology has succeeded in developing lower limb prostheses to substitute or superior to joints and heart valves, the genetic make out the map of the human genome. The airline has developed more capable aircraft passengers and flight autonomy and space shuttles have been made ever faster.

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