History is imperfect and biased, and it always, always has omissions. The most common omissions are the bits that the writer of that history took for granted that his readers would know.

Tansy Rayner Roberts’ quote, "History is imperfect and biased, and it always, always has omissions. The most common omissions are the bits that the writer of that history took for granted that his readers would know," underscores the inherent subjectivity and imperfection of historical records. Roberts points out that history, as it is written and passed down through generations, is shaped by the perspectives and biases of those recording it. These biases can influence which events, people, and perspectives are highlighted or overlooked, leading to an incomplete or skewed portrayal of the past.

The quote highlights the fact that history is often written with certain assumptions or presumptions about what is considered important or common knowledge. Omissions occur when historians, or anyone documenting events, leave out details that they assume their audience is already familiar with. This can create gaps in understanding, especially for future generations who may not share the same cultural, social, or intellectual context as the original writer. Roberts is pointing out that what may seem obvious or self-evident to one generation may not be so to another, leading to historical gaps.

Roberts' comment reflects a broader recognition of how historical narratives are constructed. Since history is often told through the lens of the historian's time and viewpoint, certain facts or events may be intentionally or unintentionally excluded, shaped by the values, priorities, and even politics of the writer. This idea challenges the traditional belief that history is an objective recounting of facts, highlighting instead its subjective nature and the incomplete way in which it is passed down.

The origin of this quote can be traced to Roberts’ understanding of the limitations of history and how it is communicated. As an author and thinker, Roberts is concerned with the way that historical narratives are shaped by those who write them, often leaving behind significant details that could offer a more comprehensive understanding of the past. Her statement encourages readers to approach historical accounts with critical thinking, aware of the omissions and potential biases that may influence how history is understood.