Intellectual Discourse of the Early Twentieth Century – The Call of the Flock ; ; Duong Ba Trac's "Intellectual Discourse of the Early Twentieth Century – The Call of the Flock" is a special document that helps readers return to the early twentieth century – the period of violent transformation of Vietnamese history. In the context of social fluctuations, old and new ideas colliding, scholars and intellectuals have raised their voices about innovation, about the destiny of the nation, about the responsibilities of soldiers before the times. The work not only records the discourses rich in patriotic spirit but also reflects the concerns, aspirations for change and the sense of self-reliance of a generation standing in the middle of a historical turning point.