World War 1 that sparked on 28 th July 1914 was caused by a number of intertwined factors; the sparking day was when Archduke Franz Ferdinand and his wife were assassinated in Sarajevo. The death of the heir to the Austro-Hungarian throne triggered anger, conflicts, and hostility that had stockpiled for decades among tribes in Central Europe. The stockpiled conflicts and hostility had been built by diplomatic clashes among the then Great Powers (Austria-Hungarian Empire, Italy, France, Great Britain, Germany, and Russia); the failed diplomacy can be traced since 1867, they created and left high tensions among the nations. There are many versions that have been developed by historians and philosophers, however the most talked and agreed cause is the “One Thing Led to Another”. According to the concept Austro-Hungarian wanted to partake disciplinary measures upon Balkans; however the German repelled them as they wanted greater power and international influence. The move by German did not go well with Britain Navy army who responded by Dreadnought and greater warships. France also desired to revenge against Germans following disastrous defeat in 1871; the defeat had created rising tension in France Army, they seemed to have been waiting for time to revenge. Japanese and Russian Military war in 1905 created the anxiety to restore some semblance of national prestige; the anxiety was high enough that it could be triggered to war. The trigger took effect on the 28 th July 1914 when every nation seemed to take different stand on the occasion; despite the action, it’s true that the underlying pressures and conflicts only find their path to be expressed unfortunately through war. Factors that led inexorably to World War 1 can be summed up as militarism, alliances, nationalism, and imperialism differences that prevailed among the early 20 th century Great Powers. In Western Europe, the war went till early 1920 however in the eastern side the war ended on 11:00 am GMT on November 11, 1918. The aftermath of the war was felt in economic, social, and cultural arenas in Africa, Europe, and Asia; there were also some effects on those countries that never got involved directly. In a nutshell the effect can be classified as demolition of countries/territories, formation of international organizations that aimed at preventing any such future attacks, formation of new countries, creating of ideologies in people among others. Before the end of war in 11 th Nov. 1918, Germany lost approximately 523,000 people from hunger and war effect; during war there was what was referred to as blockade of Germany. Blockade of Germany was export restrictions by other war countries to Germany; Germany them depended on importation so the suffering was severe. In 1918, there was an outbreak of flue which was mistaken to be Spanish Flu; it is estimated that the viral disease claimed the lives of over 50 million people worldwide. The cost involved in the war were much and had an effect on the fighting countries at the expense of economic , social, and political development of the fighting nations. For example the United Kingdom expense made the country to be a net borrower with approximately 40% its government spending being financed f