Determining the exact number of generations of Homo sapiens is complex and can vary based on the context in which we consider generations. If we look at it from an evolutionary perspective, modern humans, or Homo sapiens, are believed to have emerged approximately 300,000 years ago. Considering an average generation time of about 20 to 30 years, this would suggest that there have been roughly 10,000 to 15,000 generations of Homo sapiens.
However, if we focus on more recent historical contexts, such as the last few thousand years, the number of generations can be calculated more specifically. In recorded history, which stretches back about 5,000 years, the number of generations would be closer to 200 to 250, depending on the average generation time used for calculations.
Ultimately, while the exact number can vary depending on the measure and context, it is clear that Homo sapiens have a long lineage, with thousands of generations contributing to the diverse humanity we see today.