387 BC

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Physics

The Greek philosopher Plato founds his school, the Academy, at Athens and begins his trilogy, Timaeus, Critias, and Hemocrates, finishing only Timaeus, in which he expounds his theory of four elements -- earth, water, air, and fire -- and hints at a fifth element, the ether. See also 450 bce Physics. (See biography.)

Tools

Plato is said to build an "alarm clock" to wake up his students. According to one account, it is a clepsydra that consists of a vessel slowly filling with water and in which floats a bowl with lead balls. When the bowl reaches the rim of the vessel, it topples over and the lead balls fall on a copper plate. Another reconstruction has Plato using two jars and a siphon. Water slowly empties through the night until it reaches the siphon, whereupon it swiftly is transported via the siphon to the other jar. Water rising in the other jar forces air through a whistle, sounding the alarm. See also 1380 bce Tools.


Millennium: 1st millennium BC
Centuries: 5th century BC4th century BC3rd century BC
Decades: 410s BC  400s BC  390s BC  – 380s BC –  370s BC  360s BC  350s BC
Years: 390 BC 389 BC 388 BC387 BC386 BC 385 BC 384 BC
387 BC by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
387 BC in other calendars
Gregorian calendar 387 BC
Ab urbe condita 367
Armenian calendar N/A
Assyrian calendar 4364
Bahá'í calendar -2230–-2229
Bengali calendar -979
Berber calendar 564
English Regnal year N/A
Buddhist calendar 158
Burmese calendar -1024
Byzantine calendar 5122–5123
Chinese calendar 癸巳
(2250/2310)
— to —
甲午
(2251/2311)
Coptic calendar -670–-669
Ethiopian calendar -394–-393
Hebrew calendar 3374–3375
Hindu calendars
 - Vikram Samvat -330–-329
 - Shaka Samvat N/A
 - Kali Yuga 2715–2716
Holocene calendar 9614
Iranian calendar 1008 BP – 1007 BP
Islamic calendar 1039 BH – 1038 BH
Japanese calendar
Julian calendar
Korean calendar 1947
Minguo calendar 2298 before ROC
民前2298年
Thai solar calendar 157


Year 387 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Papirius, Fidenas, Mamercinus, Lanatus and Poplicola (or, less frequently, year 367 Ab urbe condita). The denomination 387 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

By place

Greece

  • Antalcidas, commander of the Spartan navy, actively assists Persia against Athens. After escaping from the Athenian blockade at Abydos, he attacks and defeats a small Athenian force, then joins his fleet with a supporting fleet sent from Syracuse. With this force, which is soon further augmented with ships supplied by the Persian satraps of the region, he sails to the Hellespont, where he is in a position to cut off the trade routes that bring grain to Athens.
  • The Persians, unnerved by some of Athens' actions, including supporting King Evagoras of Cyprus and Pharaoh Hakor of Egypt (both of whom are at war with Persia), decide that their policy of weakening Sparta by supporting its enemies is no longer wise. So Antalcidas enters into negotiations with the Persian satrap Tiribazus and reaches an agreement under which the Persians will enter into the war on the Spartan side if the allies refuse to make peace.
  • With Antalcidas' Spartan fleet in control of the Hellespont, Sparta deprives Athens of her Bosporus trade and tolls. The Athenians, mindful of being in a similarly serious situation as when defeated in the Peloponnesian War less than two decades before and facing Persian intervention on Sparta's side, are thereby ready to make peace.
  • With the support of the Persian King Artaxerxes II, King Agesilaus II of Sparta concludes "the King's Peace" (or the Peace of Antalcidas, after the Spartan envoy and commander) with Greek allied forces in a manner favourable to Sparta. Under the Peace, all the Asiatic mainland and Cyprus remain under Persian control, Lemnos, Imbros, and Scyros remain Athenian dependencies, and all the other Greek states are to receive autonomy. By the King's Peace, the Persians become key players in Greek politics.
  • Under the threat of Spartan intervention, Thebes disbands its league, and Argos and Corinth end their shared government. Corinth, deprived of its strong ally, is incorporated back into Sparta's Peloponnesian League. After eight years of fighting, the Corinthian War is at an end.
  • Plato founded the Platonic Academy in Athens, where he taught Aristotle until 347 BC.

Sicily

  • With the aid of the Lucanians, Dionysius I of Syracuse devastates the territories of Thurii, Crotone, and Locri in mainland Italy. When Rhegium falls, Dionysius becomes the chief power in Greek Southern Italy. He then turns his attention to the Adriatic.
  • Plato is forced by Dionysius to leave Syracuse after having exercised the right of free speech too broadly. Plato returns to Athens, outside which he founds a school.

Roman Republic


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References


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