The Trinity, God the Father, God the Son and God the Holy Spirit decided that Jesus would come to earth and redeem mankind with His blood so they can can inherit what He planned to provide for them.

       According as he hath chosen us in Him before the foundation of the world, that we should be holy and without blame before Him in love:
Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
To the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;