The development of abstract algebra brought with itself group theory, rings and fields, Galois theory.

Although the Principate continued in theory until the reign of Diocletian, Severus Alexander's death signalled the beginning of the chaotic period known as the Crisis of the Third Century which brought the empire to near collapse.

His emphasis on the role of universal properties brought category theory into the mainstream as an important organizing principle.

The system of Chinese astrology was elaborated during the Zhou dynasty ( 1046 – 256 BC ) and flourished during the Han Dynasty ( 2nd century BC to 2nd century AD ), during which all the familiar elements of traditional Chinese culture – the Yin-Yang philosophy, theory of the 5 elements, Heaven and Earth, Confucian morality – were brought together to formalise the philosophical principles of Chinese medicine and divination, astrology and alchemy.

The 9th-10th century master of the religious system known as " the nondual Shaivism of Kashmir " ( or " Kashmir Shaivism ") and aesthetician, Abhinavagupta brought rasa theory to its pinnacle in his separate commentaries on the Dhvanyāloka, the Dhvanyāloka-locana ( translated by Ingalls, Masson and Patwardhan, 1992 ) and the Abhinavabharati, his commentary on the Nātyashāstra, portions of which are translated by Gnoli and Masson and Patwardhan.

The advent of the germ theory and advances in bacteriology brought a new level of sophistication to the theoretical use of bio-agents in war.

As motivation for his theory, Mozi brought in the Will of Heaven, but rather than being religious his philosophy parallels utilitarianism.

The second theory is that the rules of the modern game of croquet arrived from Ireland during the 1850s, perhaps after being brought there from Brittany where a similar game was played on the beaches.

A central feature in elementary particle theory is the early 20th century idea of " quanta ", which revolutionized the understanding of electromagnetic radiation and brought about quantum mechanics.

The landmark event that established the discipline of information theory, and brought it to immediate worldwide attention, was the publication of Claude E. Shannon's classic paper " A Mathematical Theory of Communication " in the Bell System Technical Journal in July and October 1948.

" Thus irreal works such as Italo Calvino's Cosmicomics and Jorge Luis Borges ' Ficciones can be seen as an attempt to find a new allegorical language to explain our changed perceptions of the world that have been brought about by our scientific and technical culture, especially concepts such as quantum physics or the theory of relativity.

Many areas of mathematics and computer science have been brought to bear on the problem, including elliptic curves, algebraic number theory, and quantum computing.

Keynes ' theory was significant because it overturned the mainstream thought of the time and brought about a greater awareness that problems such as unemployment is not a product of laziness, but the result of a structural inadequacy in the economic system.

Weyl brought the early period of the development of the theory of Lie groups to fruition, for not only did he classify irreducible representations of semisimple Lie groups and connect the theory of groups with quantum mechanics, but he also put Lie's theory itself on firmer footing by clearly enunciating the distinction between Lie's infinitesimal groups ( i. e., Lie algebras ) and the Lie groups proper, and began investigations of topology of Lie groups ( Borel ( 2001 ), ).

As with the anarchists, they too saw the Bolshevik take-over of the soviets ( like that of the trade unions ) as subverting the revolution and beginning the restoration of domination and exploitation ... Over the years this emphasis on working class autonomy has resulted in a reinterpretation of Marxist theory that has brought out the two-sided character of the class struggle and shifted the focus from capital ( the preoccupation of orthodox Marxism ) to the workers ... As a result, not only has there been a recognition that capitalism seeks to subordinate everyone's life ( from the traditional factory proletariat to peasants, housewives and students ) but that all those peoples ' struggles involve both the resistance to this subordination and the effort to construct alternative ways of being.

Thus, the theory ‘ is continually evolving as it is brought to bear on solving problems of a research or practical nature ’.

The main change that Christian thought brought was to moderate the Stoicism and theory of justice of the Roman world, and emphasize the role of the state in applying mercy as a moral example.

The Russian Revolution of 1917 ( and similar, albeit less successful, revolutions in many other European countries ) brought communism-and in particular the political theory of Leninism, but also on a smaller level Luxemburgism ( gradually )-on the world stage.

Since the soul is a spiritual substance it is not brought into being through transformation of matter, but directly by God, whence the special uniqueness of each person .." Fifty years later, Pope John Paul II, stating that scientific evidence now seemed to favour the evolutionary theory, upheld the distinction of Pius XII regarding the human soul.

That theory was brought to a focus on the question of whether man exists for the sake of government, or government for the sake of man – a distinction which may derive from, or lead to, the question of natural and absolute rights, and whether property is one of them.

The myoelastic theory states that when the vocal cords are brought together and breath pressure is applied to them, the cords remain closed until the pressure beneath them — the subglottic pressure — is sufficient to push them apart, allowing air to escape and reducing the pressure enough for the muscle tension recoil to pull the folds back together again.

Nevertheless, according to the traditional theory, a man begins in the midst of action and he analyzes its nature and immediate consequences before or while putting it forth and causing these consequences.

In it, he puts forth a new theory about the nature of space and describes how this theory influences thinking about architecture, building, planning, and the way in which we view the world in general.

The Danish historian Caspar Paludan-Müller in 1873 in his book " Sagnet om den himmelfaldne Danebrogsfane " put forth the theory that it is a banner sent by the Pope to the Danish King to use in his crusades in the Baltic countries.

The most widely held theory is put forth by Marc Bloch.

Culinary advice was influenced by the theory of humors, first put forth by the ancient Greek doctor Claudius Aelius Galenus.

In theory, real-mode applications could be directly executed in 16-bit protected mode if certain rules were followed ; however, as many DOS programs broke those rules, protected mode was not widely used until the appearance of its successor, the 32-bit Intel 80386, which was designed to go back and forth between modes easily.

Although Chomsky's theory of a generative grammar has been popular with some linguists since the 1950s, many criticisms of the basic assumptions of generative theory have been put forth by cognitive-functional linguistics, who argue that language structure is created through language use.

Edelman's interest in selective systems expanded into the fields of neurobiology and neurophysiology, and in Neural Darwinism, Edelman puts forth a theory called " neuronal group selection ".

It was Bukharin who formulated the thesis of " Socialism in One Country " put forth by Stalin in 1924, which argued that socialism ( in Marxist theory, the transitional stage from capitalism to communism ) could be developed in a single country, even one as underdeveloped as Russia.

Soon afterwards, in lectures on criminal jurisprudence he set forth his famous theory, that in administering justice judges should be strictly limited in their decisions by the penal code.

Another theory, brought forth in 2012, suggests that the monument was intended to unify the different peoples of the British island.

H. Oskar Sommer first put forth this theory in his 1890 edition of Le Morte d ' Arthur and Harvard Professor George Lyman Kittredge provided the evidence in 1896.

Bruns and Brandt have set forth an alternative theory that Lucretius did at first write the poem with Memmius in mind, but that his enthusiasm for his patron cooled.

This theory was first put forth by Everett Rogers.

Copernicus's Monetae cudendae ratio was an enlarged, Latin version of that report, setting forth a general theory of money for the 1528 diet.

Nevertheless, in the early 19th century Young put forth a number of theoretical reasons supporting the wave theory of light, and he developed two enduring demonstrations to support this viewpoint.

Game theory classifies games according to several criteria: whether a game is a symmetric game or an asymmetric one, what a game's " sum " is ( zero-sum, constant sum, and so forth ), whether a game is a sequential game or a simultaneous one, whether a game comprises perfect information or imperfect information, and whether a game is determinate.

The " inherent bad faith model " of information processing is a theory in political psychology that was first put forth by Ole Holsti to explain the relationship between John Foster Dulles ’ beliefs and his model of information processing.

Widely accepted as the most plausible theory put forth was that Emmet's remains were transferred to the Church of Ireland in St Peter's Church in Dublin under cover of the burial of Robert's sister, Mary Anne Holmes, in 1804.

They put forth the idea that strong emotions could lead to bodily ailments, the basis of today ’ s theory of psychosomatic illness.

According to this theory, living things came forth from nonliving things because the nonliving material contained pneuma, or " vital heat ".

Logicism is one of the schools of thought in the philosophy of mathematics, putting forth the theory that mathematics is an extension of logic and therefore some or all mathematics is reducible to logic.