Atomism of Democritus

and Leukippos

Material units not mathematical

entities constitute the basis of

matter.

Matter is ultimately composed of

very small indivisible pieces-atoms.

Atoms have specific properties eg

ever moving,infinite in

number,invisible,innumerable

different shapes

Plato

Platonic idealism-absolute

unchanging truths-mathematical in

nature

Theory of Ideas

Platonic atomism -amalgamation of

atomism and Pythagorean ideas

Theorem

Only five regular, closed, convex

surfaces

1.Tetrahedron-four sides

2. Cube-six sides.

3. Octahedron-eight sides.

4. Icosahedron-20 sides

5. Dodecahedron-12 sides.

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###### Document Summary

Material units not mathematical entities constitute the basis of matter. Matter is ultimately composed of very small indivisible pieces-atoms. Atoms have specific properties eg ever moving,infinite in number,invisible,innumerable different shapes. Platonic atomism -amalgamation of atomism and pythagorean ideas. Corresponds to the twelve signs of the zodiac. Assigned to air as offering a smaller resistance to motion that the icosahedron. 20 sided figure-the icosahedron- each side was an equilateral triangle. Change is purposeful-everything is in a process of becoming. Animate and inanimate are endowed with a sense of purpose. Purpose of an acorn is to grow and develop into an oak tree. Inanimate objects move in a purposeful way. Cosmos differentiated between (i)the region interior to the moon"s orbit (ii) region between the moon"s orbit and the celestial sphere. Realm of man, corruption and change-region of imperfection. (i) natural motion was either up or down-did not require a force and was purposeful.

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