Which era was the longest period of human history?MicrolithicCopper AgePaleolithicNeolithic

Understanding the Question

The question asks about the longest period in human history among the given options: Microlithic, Copper Age, Paleolithic, and Neolithic.

Analysis of Each Era

1. Paleolithic Era: This era, also known as the Old Stone Age, extends from approximately 2.5 million years ago until around 10,000 BC. It is characterized by the use of simple stone tools and a hunter-gatherer lifestyle.

2. Neolithic Era: This period, known as the New Stone Age, began around 10,000 BC and lasted until approximately 3,000 BC. It marks the advent of agriculture, which led to the formation of settled communities.

3. Microlithic Era: The term "Microlithic" generally refers to a period within the later Stone Age characterized by small stone tools, primarily seen during the Mesolithic period. This era is typically much shorter than the Paleolithic or Neolithic.

4. Copper Age: Also known as the Chalcolithic period, this era began around 5,000 BC and lasted until around 3,200 BC, marking a transitional phase from the Neolithic to the Bronze Age.

Conclusion

From the analysis, it's clear that the Paleolithic Era is the longest period in human history, lasting for nearly 2.5 million years, which significantly exceeds the durations of the other periods mentioned.

Final Answer

The longest period of human history is the Paleolithic Era.