Dr. Albert A. Harrison's sudden and untimely death in February 2015 ended an extremely productive and influential career as a rare social scientist-specifically a social psychologist-who focused on space issues such as SETI, astrobiology, planetary defense, space-based folklore, behavioral health, the human elements associated with spaceflight, and space settlement. His formidable collection of work actually contributed to building a foundation for astrosociology, a field that was established toward the end of his career in 2004. He worked with other social scientists but also with those in the space community, including contributing to several NASA projects and publications. While Dr. Harrison's early work was not aimed at helping to legitimize astrosociology, it demonstrated that social science was relevant and undoubtedly indispensable to space exploration research. And indeed, it did have that effect once he began to support the development of the field approximately one year after this author introduced it. In fact, he became the first member of the Astrosociology Research Institute's Board of Advisors in 2005. Thus, his contributions not only supported the field of astrosociology, but they also provided social scientific insights to the space community and demonstrated the importance of space-based research to the social science community. His focus on the human dimension of outer space-that is, the importance of people, culture, and society-provides a legacy that must be recognized and presented to anyone interested in space education and research. His career-long focus on collaboration among all scientists, whether they focused on STEM subjects or human subjects, is perhaps Dr. Harrison's most important contribution. He also helped push for the multidisciplinary approach that astrosociology took on at an early stage. Therefore, this paper looks at Dr. Harrison's career as a model for what can be accomplished with collaboration between the two branches of science (i.e., the physical and natural sciences vs. the social sciences, humanities, and the arts), and it further projects how this approach can benefit space exploration and settlement in the future. Humans are involved with every aspect of the exploration of space, even when they sent landers, rovers, and probes to other cosmic bodies; and what they do affects societies and their citizens. In summary, the objective of this exercise focuses on demonstrating that (1) social scientists, humanists, and artists can contribute much to space research and education through an examination of Dr. Harrison's career and (2) we need to take better advantage of this fact.