The age in which true history appeared in India was one of great intellectual and spiritual ferment. Mystics and sophists of all kinds roamed through… - Arthur Llewellyn Basham

“At most periods of her history India, though a cultural unit, has been torn by internecine war. In statecraft, her rulers were cunning and unscrupulous. Famine, flood and plague visited her from time to time, and killed millions of her people. Inequality of birth was given religious sanction, and the lot of the humble was generally hard. Yet our overall impression is that in no other part of the ancient world were the relations of man and man, and of man and the state, so fair and humane. In no other early civilisation were slaves so few in number, and in no other ancient lawbook are their rights so well protected as in the Arthasastra. No other ancient lawgiver proclaimed such noble ideals of fair play in battle as did Manu. In all her history of warfare Hindu India has few tales to tell of cities put to the sword or of the massacre of non-combatants…There was sporadic cruelty and oppression no doubt, but, in comparison with conditions in other early cultures, it was mild. To us the most striking feature of ancient Indian civilisation is its humanity.” (pp.8-9)].

Though its fame is much restricted by its specialized nature, there is no doubt that Panini's grammar is one of the greatest intellectual achievements of any ancient civilization, and the most detailed and scientific grammar composed before the 19th century in any part of the world.

In A Cultural History of India, A.L. Basham notes that “[by] the fifth century CE, Indianised states, that is to say states organised along the traditional lines of Indian political theory and following the Buddhist or Hindu religions, had established themselves in many regions of Burma, Thailand, Indo-China, Malaysia, and Indonesia”.