Art is the signature of civilizations.

Sills’s aphorism treats art as a civilization’s identifying mark—what later generations “read” to understand who a people were. Political power, wealth, and even written records can vanish or be distorted, but artistic achievements (music, architecture, painting, literature) often endure as the most vivid evidence of values, imagination, and technical mastery. Coming from an American opera star and arts administrator, the line also functions as advocacy: supporting the arts is not decorative spending but cultural self-definition. The quote implies that a society’s legacy is measured less by its slogans than by the beauty, complexity, and humanity it leaves behind.