Power. Everyone is looking for power, and terrorism is a way to get it. If you hold the entire world on a string, if you can make them go back on their defining principles, if you can stop them from believing in themselves, their hopes, their futures... How much more influence could you have?
There are two MAIN reasons. Note that there not the only reasons.
To stop other countries interfering with their country.
For religious reasons that they believe.
To get noticed as powerful and strong.
The main reason for this is that similar working day schedules around the world.
International terrorism.
The example of internatinal terrorisimis man has become affraid and suspects a every stranger. The main reason is after the world trade centre attack in the U.s.a.
The main reason is the strong rise of Muslim fundamentalism and terrorism in Arab countries in the recent decades. It has made many non-Muslim countries weary of running the risk of importing Muslim fundamentalism and terrorism into their societies.
Mainly because they wanted to spread the Catholic religion around the world.
The main reason for the revolution of the Earth around the Sun is the gravitational force of the Sun.
The physical world is tied into
War on Terrorism became a main topic in America after the terrorist attack on the Twin Towers, at the World Trade Centre in New York. In the UK, the fight against terrorist attacks had been proceeding for some years previously due to attacks by the IRA.
drug money and terrorism
the main reason for World War 1 starting is tensions between the major countries of Europe(Britain,France,Russia,Germany and Austria-Hungary)
The main issues of the immediate future are basic survival issues like food, water, and clean air. The melting of the world's glaciers is already leading to less fresh water in the rivers of the world.
Their industries are too weak to compete with foreign competitors.