The concept of adult guardianship has existed for hundreds of centuries in the intenational sphere and dates back to ancient Greek and Roman times and English common law.
Doinerstein, Robert; Grewal, Esme Grant; and Martinis, Jonathan
"Emerging International Trends And Practices In Guardianship Law For People With Disabilities,"
ILSA Journal of International & Comparative Law: Vol. 22
, Article 5.
Available at: http://nsuworks.nova.edu/ilsajournal/vol22/iss2/5