Final answer:
Ancient Greece's positive effect lies in its contribution to the development of democracy which has influenced modern societies worldwide.
Step-by-step explanation:
One positive effect of Greece is its contribution to the development of democracy. Ancient Greece is known for being one of the first civilizations to have a democratic government system, where citizens had the ability to participate in decision-making. This idea was later adopted by various other civilizations and has had a profound impact on the world today. For example, modern democracies like the United States and many other countries have been influenced by the democratic principles that originated in ancient Greece.
Learn more about Positive effect of Greece