Mauryan Empire
The author of 'Arthashastra' was a contemporary of

Ashoka
Samudragupta
Chandragupta Vikramaditya
Chandragupta Maurya

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Mauryan Empire
Chandragupta Maurya with the help of Chanakya decided to overthrow the Nandas because

the Nandas had accumulated a great deal of wealth by extortion and oppression of the people
the Nandas were low-born
Chanakya wanted to restore the ideal of Kshatriya rule
Chanakya had been humiliated by the Nandas

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