"Rule, Britannia!" is often written as simply "Rule Britannia", omitting both the comma and the exclamation mark, which changes the interpretation of the lyric by altering the punctuation. Richard Dawkins recounts in his 1976 book "The Selfish Gene" that the repeated exclamation "Rule, Britannia! Britannia, rule the waves!" is often rendered as "Rule, Britannia! Britannia rules the waves!", changing the meaning of the verse. This addition of a terminal 's' to the lyrics is used as an example of a successful meme.