Viewing the mind as a spiritual or "purely mental" entity that cannot be studied scientifically.He proposes a third way: a dialectical approach that views the mind as a product of both biological evolution and social history. 2. Higher vs. Lower Mental Functions The text distinguishes between:

Vygotsky explores how humans use "signs" (symbols, maps, writing, and speech) to master their own behavior. Just as a physical tool (a hammer) changes how we interact with the world, a psychological tool (language) changes how we think. 4. The History of Development

Complex, uniquely human processes (e.g., logical memory, self-regulation, selective attention).Vygotsky’s central thesis is that higher functions are socially mediated . We learn to control our own minds by using "tools"—most importantly, language—provided by our culture. 3. Mediation and Signs

Basic biological processes (e.g., involuntary attention, reactive memory).

is a foundational text for understanding the evolution of cultural-historical psychology.