The phrase "essential prerequisite" means something that is absolutely necessary or required before something else can happen or be achieved. Full definition
AA experience has shown that these mental attitudes on the part of the alcoholic are essential prerequisites for successful therapy. (religion-online.org)
Labour's challenge is to position the active state and responsible ownership as essential prerequisites of business success in an age of intensive global competition (blog.politics.ox.ac.uk)
The party's challenge is to position the active state and responsible ownership as essential prerequisites of business success in an age of intensive global competition. (blog.politics.ox.ac.uk)