The Time Line of Rational Commonsense is a partial sketch of some noteworthy landmarks in the development of Rational Commonsense in Western Civilization. A more extensive time line including more civilizations is another project for another day.

Note: An asterisk after a term indicates the term is being used as defined in the attached glossary. Capitalized terms also emphasize terms are being  used in accord with glossary definitions. [See Glossary]

Prehistoric culture refers to human evolution and development that occurred before the discovery of writing. For a short cut, this period is sometimes called the Stone Age.  

Egypt, founded 32 Cent BC. Wiki 2008 Oct, Egypt History

The primary sources for the following is preserved in written history backed up by other evidence.

Pythagoras (580-500 )

Pythagoras (p¹-th²g"...r-...s)  fl. sixth century B.C.. Greek philosopher and mathematician who founded in southern Italy a school that emphasized the study of musical harmony and geometry. He proved the universal validity of the Pythagorean theorem and is considered the first true mathematician. [99dic]

Archimedes (287?-212 B.C.) 75 yrs.

born & lived Greek colony of Syracuse, Sicily. He studied at Alexandria on the African coast of the Mediterranean, Against orders of Marcellus, Archimedes was killed when the Romans captured Syracuse. Some say a soldier found him in his study drawing geometric designs in the sand. Archimedes told him not to spoil the diagram. The soldier, not recognizing him and insulted by the order, killed Archimedes. There are other versions. Marcellus built a tomb for Archimedes.

Jesus 0000?

A teacher and prophet who lived in the first century of this era and whose life and teachings form the basis of Christianity. Christians believe Jesus to be Son of God and the Christ. [99dic]

Peter

Died c. A.D. 67. The chief of the 12 Apostles. He is traditionally regarded as the first bishop of Rome. [99dic]

Arius Arian (250-336)  Arianism.

Greek Christian theologian and founder of Arianism, a doctrine that led to his condemnation as a heretic. [99dic]

Jesus = greatest man but not substance with God. Condemned at Nicean council (325) as a heretic. 

Constantine (272-337)

Known as "Constantine the Great." A.D. 285?-337. Emperor of Rome (306-337) who adopted the Christian faith and suspended the persecution of Christians. He rebuilt Constantinople (now Istanbul) as the new Rome (330). [99dic]

Charlemagne (742-814) EDUCATION

Also called Charles I or "Charles the Great." 742?-814. King of the Franks (768-814) and founder of the first empire in western Europe after the fall of Rome. His court at Aix-la-Chapelle became the center of a cultural rebirth in Europe, known as the Carolingian Renaissance.

Peter Lombard (1100?-1160) Italian LOGIC, REASON, BLIND SPOTS

Italian theologian whose Sententiarum Libri IV (1148-1151) had an important influence on official Catholic doctrine concerning the sacraments.