Since the beginning of the 21st century, how to understand the earliest part of the Korean Bronze Age has been a hot issue and at its center is the Incipient Bronze Age. As the debate on its validity continued, the definition and characteristics of the Incipient Bronze Age have substantially changed.
Reviewing the research history of this period, I discuss logical and factual problems of the Incipient Bronze Age and where these problems derive from, and look into some misunderstandings of the current research tendency about my previous explanation of the Neolithic-Bronze Age Transition of Korea. Then, to understand the change in diversity of pottery design in the Bronze Age, a model is proposed. It suggests that the early Bronze Age witnessed a population boom and it led to the rapid expansion of population and social reorganization on a regional scale, leading to the coexistence of various pottery designs, and as people aggregated at some locales around 2800 BP, diversity of pottery design decreased, dominated by perforated rim design.