The population in europe had been lowered by the black death in the 1300s so that only about 90 million were living at the time of the conquest of the new world. estimates place the population of native americans in the new world at:

50 to 100 million.

Explanation:

There´s no consensus among scholars. These are approximations and it´s impossible to establish a real figure today.  A population close to that of Europe, 9O million.

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