Special needs education has evolved over time from segregation of disabled students to inclusion. Historically, disabled individuals were often excluded from schools and institutions provided little education. Pioneers like Itard, Seguin, Montessori, and Decroly developed new educational approaches for disabled students. Concepts like normalization, least restrictive environment, and mainstreaming/inclusion have increased pressure on education systems to integrate students with their non-disabled peers to the maximum extent appropriate. International agreements like Salamanca have established the right of all children to inclusive education.