Advocates say that even partial non-inclusion is morally unacceptable. Proponents believe that non-inclusion reduces the disabled students' social importance and that maintaining their social visibility is more important than their academic achievement. Proponents say that society accords disabled people less human dignity when they are less visible in general education classrooms. Advocates say that even if typical students are harmed academically by the full inclusion of certain special needs students, that the non-inclusion of these students would still be morally unacceptable, as advocates believe that the harm to typical students' education is always less important than the social harm caused by making people with disabilities less visible in society.
A second key argument is that everybody benefits from inclusion. Advocates say that there are many children and young people who don't fit in (or feel as though they don't), and that a school that fully includes all disabled students feels welcoming to all. Moreover, at least one author has studied the impact a diversified student body has on the general education population and has concluded that students with mental retardation who spend time among their peers show an increase in social skills and academic proficiency.
Advocates for inclusion say that the long-term effects of typical students who are included with special needs students at a very young age have a heightened sensitivity to the challenges that others face, increased empathy and compassion, and improved leadership skills, which benefits all of society.
A combination of inclusion and pull-out (partial inclusion) services has been shown to be beneficial to students with learning disabilities in the area of reading comprehension, and preferential for the special education teachers delivering the services.
Inclusive education can be beneficial to all students in a class, not just students with special needs. Some research show that inclusion helps students understand the importance of working together, and fosters a sense of tolerance and empathy among the student body.