The Emperor explained the Great Crusade to Corax, telling him that as a Primarch, he had heavier missions and responsibilities to shoulder. He absolutely could not waste his gifts on this single planet.
Corax understood what the Emperor meant. He was asking him to sacrifice his small family for the greater whole. Moreover, by the time Corax joined, the Great Crusade was already nearing its end, drawing ever closer to the bright future the Emperor had promised. Corax chose to pledge his loyalty to the Emperor and swore that he would spare no effort for the victory of the Great Crusade.
Corax left, departing from his worker brothers. The Adeptus Mechanicus arrived, building even larger factories atop the ruins of the giant corporations that had just been dismantled. Although the workers' lives improved somewhat, the essence of exploitation had not changed in the slightest. The officials sent by the Emperor constantly preached the Imperial Truth and the supremacy of reason, yet the tech-priests in charge ordered the workers to kneel before the machines and pray.
The workers felt they had been shamefully betrayed. Once again, they took up arms and prepared to drive the Adeptus Mechanicus from their land, but their uprising was suppressed by the Adeptus Mechanicus and the Imperial government.
Upon hearing the news, Corax returned to Deliverance. The workers shouted at him, "You've changed! What happened to the justice in your heart? Did that Emperor with his mouth full of lies steal it all away?"
Corax explained to the workers that only by achieving the Great Crusade could humanity attain true liberation and revival.
The workers scoffed at such words, and Corax hurriedly departed with guilt in his heart. He had always believed the Emperor was right. As long as his plan succeeded, everything they endured now