What weakness most likely made it impossible for all citizens to be adequately represented?

One significant weakness that likely hindered adequate representation for all citizens was the lack of universal suffrage, which often excluded marginalized groups based on race, gender, or socioeconomic status. Additionally, systemic biases within political structures and institutions could prevent equitable access to representation. This exclusion not only limited participation in the democratic process but also perpetuated power imbalances, making it difficult for the interests of all citizens to be genuinely represented.