sentences:  The Space Age was concurrent with this time, encompassing the activities related to the Space Race, space exploration, space technology, and the cultural developments influenced by these events.Pax Americana is an appellation applied to the historical concept of relative liberal peace in the Western world, resulting from the preponderance of power enjoyed by the United States of America after the end of World War II in 1945.The post-1945 world experienced the establishment of many new states.