I would say the Internet. The Internet has helped to connect people digitally around the world. It provides quick sources of entertainment and information.
If we want to know what's airing at the nearest cinema we can just look it up. If we want letters to be sent quickly that can happen in a second.
Nuclear bombing of the Japanese cities of Hiroshima and Nagasaki were two of the most striking and shocking moments in twentieth-century history. In addition to marking the end of World War II, the terrible events on Japanese soil impacted Japanese society, relations between countries, and the way the world's population came to view international conflicts. In the items below you understand the reasons of such impact on world geopolitics.
On June 1914 group of six Austrians gather to assassinate Archduck but failed. The reaction among the people in Australia was mild and indifferent. This was the trigger to World War I. Russia declared mobilization in a month. Germany declare war on Russia a month later in August. While Japan entered the war on the side of allies on 23August. France began full mobilization on 1 August and on 3 August Germany declared war on France. Belgium and Luxembourg dead soon without struggle.
It made it easier to get things from 1 place to another
