Simplify the following text for a Grade 11 native English-speaking person.
Original: The tendency has been for this fine anatomical work to be overshadowed by his energetic and controversial activity in favor of evolution , and by his extensive public work on scientific education , both of which had significant effects on society in Britain and elsewhere .
Simplified: His activity in favor of evolution , and his public work on scientific education , had a big effect on society in Britain and elsewhere .