It is advantageous for historians to hide the existence of ancient civilizations before humans

The assertion that historians might "hide" the existence of ancient civilizations before humans is a complex and speculative topic. Here are several points to consider regarding why some might perceive advantages or disadvantages to such a notion:

**Historical Narrative**: Historians construct narratives based on available evidence. The focus tends to be on human civilizations, as they leave behind artifacts, texts, and other forms of documentation. Civilizations that do not fit into the accepted narrative may be overlooked simply because there is a lack of evidence.

**Focus on Human Development**: The study of history is often centered on human societies, cultures, and developments. This focus may exclude or minimize the significance of pre-human civilizations, even if they exist in geological or paleontological terms. 

**Scientific Interpretation**: There is a scientific consensus regarding the timeline of human evolution and civilization. Claims of ancient non-human civilizations would require substantial evidence and would likely undergo rigorous scrutiny. 

**Cultural Narratives**: There is a cultural tendency to emphasize human achievements. Some may argue that highlighting pre-human civilizations could challenge certain worldviews or philosophies regarding humanity's place in the universe.

**Conspiracy Theories**: Ideas about hidden histories often emerge from conspiracy theories, which can gain traction when people feel disenfranchised or distrustful of mainstream narratives. Such theories may offer an alternative explanation for historical gaps.

**Value of Discovery**: Uncovering new historical evidence can be exciting and reshape our understanding of the world. If evidence of ancient civilizations were to be discovered, it could transform our knowledge and prompt new research themes.

In conclusion, while there could be perceived advantages or disadvantages to the concept of ancient civilizations that predate human history, the ideas should be approached critically and with a focus on evidence-based research. Historians aim to understand and interpret past societies as accurately as possible, based on the information and evidence available to them.