This paper discusses the building of rational and integrative historical consciousness to sustain the vision of Indonesia Onward. This is inseparable from what has happened lately, that there have emerged several fictitious empires by an unreasonable historical claim and considered to threaten the national integration. Based on this phenomenon and the study of concept through literature study, this paper aims to provide a more comprehensive understanding of historical consciousness that needs to be built amid society, especially during the post-truth era at this time. Historical consciousness is very important because both critical thinking and nationalism can be developed. The latest phenomenon has become a momentum that building historical consciousness should be more encouraged to anticipate the destructive effects of information technology advances, such as hoax that leads to criminal cases and harms many people. If traced back, this problem was not new. Historians have long reminded the importance of building historical consciousness. The role of each party is very important, starting from academics, education, to the wider community. Therefore, building historical consciousness does not mean out of date. Many innovations can be done so historical consciousness still has relevance to the present and future. Thus, historical consciousness can become increasingly real and history can be felt to belong to all.