Ancient Greece, at one time one of the world's most advanced and imaginative societies in history, was influential on its contemporaries, and its influence has remained topical even into the 21st century, with its contributions to military, political, artistic, and social institutions widely recognizable in all western spheres both maintaining relevance.Ancient Greece, at one time one of the world's most advanced and imaginative societies in history, was influential on its contemporaries, and its influence has remained topical even into the 21st century, with its contributions to military, political, artistic, and social institutions widely recognizable in all western spheres both maintaining relevance.