Why do many pop songs have so many different songwriters listed?

Question

I see so many songs with 3-5 or more listed in the credits. I always thought sometimes one person wrote music, and another wrote lyrics. Why can it take around 5 people to write a song?

In: 120

Answer 1

As an antedote to this, watch some of the Beatles documentary “Get back”. They made up their words and music without outside help. It was beautiful and memorable and still played more than 50 years later.