Flatland is a two-dimensional world where inhabitants, known as Flatlanders, exist as geometric shapes. The society is structured by social hierarchy, with shapes like circles at the top and lines at the bottom. Their perception is limited to length and width, lacking any understanding of height or depth. The concept of Flatland was popularized by Edwin A. Abbott in his 1884 novella, which serves as an allegory for social and cultural issues. The story explores themes of dimensionality and perspective, encouraging readers to consider the limitations of their own understanding of reality and the existence of dimensions beyond their perception.