Different histories, cultures, mentalities and social development stages characterize cities worldwide.
Each urban organism is different.
But no matter where people live together they
found and / or developed their own specific "smart" solutions of coexistence.
These solutions can be both surprisingly simple, or characterized by a complex combination of social adaptation and tradition , but with one commonality across all regions and cultures : THEY DO WORK! ... often for centuries, or as reaction to meet new or changing situations and conditions.