I'm an Aussie and I've never eaten meat 
EDIT: I am also very capable of abstract thought and easily consume enough protein. Having extra protein above a certain point does not influence muscle/brain development whatsoever it just meant more nitrogen must be removed from your body unused.
EDIT: I am also very capable of abstract thought and easily consume enough protein. Having extra protein above a certain point does not influence muscle/brain development whatsoever it just meant more nitrogen must be removed from your body unused.