Mankind - Redefined

Mankind-Redefined is an Institute main quest and achievement/trophy in Fallout 4.

Quick walkthrough

 * 1) Meet with Father atop the roof of C.I.T. ruins.
 * 2) Attend the Directorate meeting.
 * 3) Speak with Father again.
 * 4) Speak with Allie Filmore to start the next quest.

Detailed walkthrough
Meet Father on the rooftop after The Battle of Bunker Hill, He will request for the Sole Survivor to attend the next Directorate meeting. There, Father will make it public knowledge that he is dying from an aggressive form of cancer, and that he will be appointing the Sole Survivor as his successor upon death.

Speaking with Father afterwards, he will state that it will take time for the scientists to accept that the Sole Survivor will become the new director, but will give assurances that the Sole Survivor will be the future of the Institute, and his legacy.

Speak to Allie Filmore to begin the next quest, Mass Fusion.