Contemporary ideas from systems theory have grown with diversified areas, exemplified by the work of biologist Ludwig von Bertalanffy, linguist Béla H. Bánáthy, ecological systems with Howard T. Odum, Eugene Odum and Fritjof Capra, organizational theory and management with individuals such as Peter Senge, interdisciplinary study with areas like Human Resource Development from the work of Richard A. Swanson, and insights from educators such as Debora Hammond and Alfonso Montuori.

Important names in contemporary systems science include Russell Ackoff, Béla H. Bánáthy, Anthony Stafford Beer, Peter Checkland, Robert L. Flood, Fritjof Capra, Michael C. Jackson, Edgar Morin and Werner Ulrich, among others.

Béla H. Bánáthy, who argued — along with the founders of the systems society — that " the benefit of humankind " is the purpose of science, has made significant and far-reaching contributions to the area of systems theory.

* Evolutionary systems — Béla H. Bánáthy developed a methodology that is applicable to the design of complex social systems.

* Béla H. Bánáthy ( 2000 ) Guided Evolution of Society: A Systems View ( Contemporary Systems Thinking ).

* A Taste of Systemics By Béla H. Bánáthy

* International Systems Institute, a non-profit, public benefit scientific and educational corporation founded by Béla H. Bánáthy

* Béla H. Bánáthy ( 1919 – 2003 ), linguist, systems scientist, educator, founder of White Stag Leadership Development Program

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This was later modified by Béla H. Bánáthy of the Primer Group to a fourfold model, the philosophy, the science, the methodology and the application of systemics.

In 1984, he was co-founder with Béla H. Bánáthy, Riane Eisler, John Corliss, Francisco Varela, Vilmos Csanyi, Gyorgy Kampis, David Loye, Jonathan Schull and Eric Chaisson of the initially secret General Evolutionary Research Group.

He was the younger son of King Béla III of Hungary, who invested him with the government of the Principality of Halych.

Andrew was the second son of King Béla III and his first wife, Agnes of Antioch.

Nevertheless, when Prince Vladimir II Yaroslavich of Halych, who had been expelled from his country by his subjects, fled to Hungary seeking for assistance in 1188, King Béla III had him arrested and occupied his principality and he invested Andrew with Halych.

On 23 April 1196, King Béla III died and he left the Kingdom of Hungary unportioned to his eldest son, Emeric, while Andrew inherited a large amount of money in order to fulfill his father's Crusader oath.

Following his return, he ordered the execution only the leader of the conspirators and he forgave the other members of the group, which resulted in the emerging antipaty of his son, Béla.

In 1220, Andrew entrusted the government of Slavonia, Dalmatia and Croatia to his son, Béla.

Andrew also enforced Béla to separate from his wife.

In 1223, the junior King Béla IV took back his wife and escaped to Austria fearing of Andrew's anger.

The junior King Béla IV started, with the authorization of Pope Honorius III, to take back the royal domains in his provinces that Andrew had granted to his partisans during the first half of his reign.

Andrew opposed his son's policy and he entrusted Béla with the government of Transylvania while his younger son, Coloman became the governor of Béla's former provinces.

After a successful campaign Manuel I and Andronikos returned together to Constantinople ( 1168 ); but a year later, Andronikos refused to take the oath of allegiance to the future king Béla III of Hungary, whom Manuel desired to become his successor.

* 1241 – Batu Khan defeats Béla IV of Hungary at the Battle of Muhi.

* 1884 – Béla Balázs, Hungarian critic, writer, and poet ( d. 1949 )

Béla Viktor János Bartók (; ; March 25, 1881 – September 26, 1945 ) was a Hungarian composer and pianist.

Béla Bartók was born in the small Banatian town of Nagyszentmiklós in the Kingdom of Hungary, Austria-Hungary ( since 1920 Sânnicolau Mare, Romania ) on March 25, 1881.

In Pozsony, Béla gave his first public recital at age eleven to a warm critical reception.

Their son, Béla III, was born on August 22, 1910.

Following the 1919 revolution, he was pressured by the new Soviet government to remove the name of the librettist Béla Balázs from the opera ( Chalmers 1995, 123 ), as he was blacklisted and had left the country for Vienna.

His oldest son, Béla Bartók, Jr., remained in Hungary where he survived the war and later worked as a railroad official until his retirement in the early 1980s.

Béla Bartók died at age 64 in a hospital in New York City from complications of leukemia ( specifically, of secondary polycythemia ) on September 26, 1945.

During the final year of communist Hungary in the late 1980s, the Hungarian government, along with his two sons, Béla III and Péter, requested that his remains be exhumed and transferred back to Budapest for burial, where Hungary arranged a state funeral for him on July 7, 1988.

* A statue of Béla Bartók stands in Brussels, Belgium near the central train station in a public square, Spanjeplein-Place d ' Espagne.

* A bust and plaque located at his last residence, in New York City at 309 W. 57th Street, inscribed: " The Great Hungarian Composer / Béla Bartók / ( 1881 – 1945 ) / Made His Home In This House / During the Last Year of His Life ".

* 1060 – Béla I of Hungary is crowned king of Hungary.

Elfman's classical influences include Béla Bartók, Philip Glass, Lou Harrison, Carl Orff, Harry Partch, Sergei Prokofiev, Maurice Ravel, Erik Satie, Igor Stravinsky and Pyotr Ilyich Tchaikovsky.

Béla Heinrich Bánáthy ( December 1, 1919 – September 4, 2003 ) was a Hungarian linguist, systems scientist and a professor at San Jose State University and UC Berkeley.

Béla Bánáthy was born in 1919 in Gyula, Hungary.

Peter Bánáthy had earned the honorary title Vitéz for his service during World War I, and Béla, as his oldest son, would inherit the title.

Bánáthy was able to get his wife Eva, one year old son Béla and two-week old son László out of Budapest.

Bánáthy later traded for milk to give two-year-old Béla and one-year-old László enough protein.

The family was living in a refugee camp in Austria and sent László and his brother Béla to temporarily live with family in Hungary. On February 28, 1956, Bánáthy become a United States citizen.

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