What ancient civilization's have had the greatest effect on modern civilization?

Several ancient civilizations have significantly influenced modern society, but the most notable include the Greeks, Romans, and Chinese. The Greeks laid the foundations of democracy, philosophy, and science, while the Romans contributed to law, engineering, and governance. Meanwhile, ancient China introduced innovations in technology, philosophy, and trade, particularly through the Silk Road. Together, these civilizations have shaped contemporary political systems, cultural practices, and scientific advancements.