QFT & GR: Essential to Learn Before String Theory?

[pivoxa15]

How essential is it to know QFT and/or GR before learning string theory?

Is QFT more important or both equally as important?

 

[cristo]

Well given that string theory uses language from both areas, I'd say it was very important to have a working knowledge of GR and QFT before trying to learn that mathematics of string theory.

 

[andytoh]

QFT for certain, GR is useful.