Dialectics is a mode of reasoning and a theory of historical development based on the idea that reality and thought unfold through contradiction, negation, and synthesis. Originating in ancient philosophy, it was transformed into a systematic method by [[Hegel]] and then applied to history and economics by [[Marx]].
The original meaning of dialectic (from Greek dialegein, "to converse") is the method of reasoned dialogue — seeking truth through question and answer. [[Socrates]] practiced this as elenchus: exposing contradictions in an interlocutor's beliefs.
[[Plato]] elevated dialectic to the highest form of philosophical inquiry — the method by which the mind ascends from opinion through mathematics to pure knowledge of [[The Forms]]. Dialectic is contrasted with rhetoric (persuasion) and eristic (arguing to win).
[[Aristotle]] gave "dialectic" a more modest role: reasoning from probable premises, in contrast to the demonstrative reasoning of science. See [[Logic]].
[[Hegel]] radicalized dialectic into a metaphysical and logical principle. The famous but oversimplified formula is:
Thesis → Antithesis → Synthesis
Hegel himself rarely used these terms, preferring to speak of Aufhebung (sublation):
- A concept or state of affairs (the "in itself")
- Encounters its internal contradiction or negation (the "for itself")
- The contradiction is resolved in a higher unity that cancels, preserves, and elevates both (the "in and for itself")
This is not merely a logical trick — for [[Hegel]], reality itself moves dialectically. The contradiction is real, and the synthesis is genuinely higher.
- Being and Nothing: Pure Being (devoid of all determination) passes into Nothing; the synthesis is Becoming (Being in motion)
- Master and Slave (Phenomenology of Spirit): The Master needs the Slave's recognition but gets it from someone unfree; the Slave achieves genuine self-consciousness through labor; the contradiction drives toward a higher form of mutual recognition
- History: World history is the progressive self-realization of Spirit — freedom increasing through contradiction and resolution
See [[Hegel]].
[[Marx]] "stood Hegel on his head" — preserving the dialectical method but replacing Idea with matter:
"My dialectical method is, in its foundations, not only different from the Hegelian, but directly opposite to it." — Capital, Afterword
For [[Marx]]:
- It is material conditions (forces and relations of production), not Spirit, that drive history
- Contradictions are social and economic (e.g., between productive forces and property relations, between proletariat and bourgeoisie)
- The synthesis is not a higher idea but a new mode of production and social organization
- Ultimately: the contradictions of capitalism produce the conditions for its own overcoming in communism
This is called dialectical materialism (a term coined by Engels, not Marx himself). See [[Marx]].
Traditional [[Logic]] (following [[Aristotle]]) holds the law of non-contradiction: a thing cannot both be and not be at the same time in the same respect. Dialectics challenges this — not by denying the law in formal logic, but by arguing that real things contain genuine contradictions that drive their development.
[[Wittgenstein]] and analytic philosophers generally rejected Hegelian dialectics as philosophically confused. This is one of the deepest fault lines in philosophy.
- Critical Theory (Frankfurt School — Adorno, Horkheimer) applied dialectics to Enlightenment itself: reason contains the seeds of its own domination (Dialectic of Enlightenment)
- Feminist dialectics — applying contradiction to gender relations
- Dialectics of nature — Engels extended dialectical materialism to natural science, controversially
- [[Hegel]] — dialectics as the logic of Absolute Spirit
- [[Marx]] — dialectical materialism and historical change
- [[Logic]] — formal logic as dialectics' opponent and context
- [[Socrates]] — the original dialectical philosopher
- [[Plato]] — dialectic as the highest philosophical method
- [[Phenomenology]] — Hegel's phenomenological dialectic
- [[Political Philosophy]] — dialectical accounts of history and revolution
- [[Consciousness]] — the master-slave dialectic as theory of self-consciousness