4 — Terrorism
According to Professor Paul Wilkinson, chairman of the advisory board of the Center for the Study of Terrorism and Political Violence at the University of St. Andrews, the society today is more vulnerable to terrorism because it is easier for a malevolent group to get the necessary materials, technology and expertise to make weapons of mass destruction. Right now, the most likely cause of massive scale terrorism casualties would be a chemical or biological weapon. Large scale release of something like Anthrax or smallpox virus would have a huge effect, and modern communications are promptly a transnational problem. In an open society, in which we value freedom of movement, we cannot guarantee that such an attack can be slowed down and there is a high probability that a major attack can occur somewhere in the world. Sighting the increased terrorist activities in the middle-eastern countries, it is clear that a third World War is not far. If that happens, then the loss to humans will be unimaginable.
3 — Viral Pandemic
The virologist, Maria Zambon of the Health Protection Agency's Influenza Laboratory, explains that we have experienced 4 major flu epidemic besides AIDS and SARS -the severe acute respiratory syndrome, in the last century. This has caused the extended use of medicines on a larger scale. Massive pandemics have shaken the world in the past years and it is inevitable that at least one occurring in the future. At the moment, the most serious concern is the avian H5 influenza in chickens in Southeast Asia. If this virus gets transmitted to humans, it could spread rapidly all over the world. The 1918 flu caused 20 million deaths in just one year. A similar outbreak today could have a devastating impact. It is possible that such an impact might not finish the human race completely, but cause a huge setback for many years to come. The Possibility of a viral pandemic over the next 70 years is very High.
2 — Climate Change
Nick Brooks, a researcher at the Tyndall Centre for Climate Change Research at the University of East Anglia has said that it is possible that greenhouse gases might constitute the major portion of the atmosphere, at the end of this century, and that the global temperature may increase by at least 2 degrees. This is hotter than the Earth has experienced in the last one and a half million years. In the worst case, it could alter the climate in many regions of the world. This change could lead to a global food insecurity and massive collapse of existing social ecosystems, causing migration and conflicts over resources as parts of the world become uninhabitable. This could have a huge impact on human understandings of one another. They could start to fight for resources and this could lead to the depletion of the human race from Earth at a much faster rate.