An Indian state's harmonious approach to life Wildlife/Alamy Aizawl is India's only "honk-free" city, where people follow traffic rules and don't blare their horns In Mizoram in north-east India, harmony and sustainability of society – rather than economic wealth – are the most valued objectives in life. "It’s hard to trace the beginnings of tlawmngaihna," said Naulak, "But it’s been …