Original sentence: He is most well-known for the children's book Sandford and Merton (1783-1789) which emphasized Rousseauvian educational ideals
Edited sentence: His reputation rests mainly on Sandford and Merton (1783-1789), a book for the young, which, though it may now seem quaintly didactic and even ridiculous, was at one time considered of educational value as inculcating manliness and independence