The relationship between microevolution and macroevolution, and the structure of the extended synthesis.

Area of Science:

• Evolutionary biology
• Population genetics
• Paleontology

Background:

• The evolutionary synthesis established a link between microevolutionary processes and macroevolutionary patterns.
• Subsequent research has explored and debated this relationship, particularly after the 1970s.

Purpose of the Study:

• To analyze the conceptual relationship between microevolution and macroevolution.
• To demonstrate that macroevolution has consistently been understood as dependent on microevolution throughout the history of evolutionary synthesis and beyond.

Main Methods:

• Historical analysis of evolutionary theory.
• Conceptual review of scientific literature on evolutionary synthesis and subsequent developments.

Main Results:

• The traditional evolutionary synthesis clearly defined macroevolution as a consequence of microevolutionary changes.
• Post-synthesis critiques and new perspectives, despite their differences, have continued to frame macroevolutionary phenomena as dependent on microevolutionary mechanisms.

Conclusions:

• The dependence of macroevolution on microevolution remains a persistent theme in evolutionary biology.
• Despite shifts in theoretical approaches, the fundamental hierarchical relationship has been maintained.