The benefits of human spaceflight is questionable. An assessment carried out by the National Academies of Science and Engineering stated that “no defensible calculation of tangible, quantifiable benefits — spinoff technologies, attraction of talent to scientific careers, scientific knowledge, and so on — is likely ever to demonstrate a positive return on the massive investment required by human spaceflight."
Manned space flights are unnecessary because machines can do all the work astronauts can at a lower cost. Such costly investments have only negligible "intangible benefits" such as inspiration and togetherness, and they have only continued because of humans' hubris and unwillingness to let space exploration be dominated by machines.
Additionally, space exploration already connects people from all different backgrounds and cultures. At the 24th Asia Pacific Regional Space Agency Forum, countries including Japan, Indian, Indonesia, Thailand, Vietnam, Malaysia, South Korea, France and Russia began discussing a collaborate plan to develop CubeSats. CubeSats are lightweight satellites designed to conduct scientific research and observations of Earth from space.
This is only the beginning of many collaborations between countries. By working together on cutting edge technology and space exploration, unmanned space exploration does just fine a job of bringing people together.