Global politics include different practices of political globalization in relation to questions of social power: from global patterns of governance to issues of globalizing conflict. The 20th century witnessed the outcome of two world wars and not only the rise and fall of the Third Reich but also the rise and fall of communism. The development of the atomic bomb gave the United States a more rapid end to its conflict in Japan in World War II. Later, the development of the hydrogen bomb became the ultimate weapon of mass destruction.