Why did public opinion lead to expansion?

Public opinion often drives expansion by reflecting the collective desires and beliefs of the population, which can manifest in a demand for new territory, resources, or opportunities. In many historical contexts, such as the westward expansion in the United States, citizens rallied around ideals like Manifest Destiny, believing it was their right and duty to expand their nation. This widespread sentiment can pressure governments to act in ways that align with popular aspirations, leading to territorial acquisition and growth. Ultimately, when a significant portion of the population supports expansion, it can create a political climate conducive to policies that facilitate such growth.