Human chemistry is the study of reactions between individuals who are viewed as chemical species and with the energy, entropy, and work that quantify these processes.  Historically, human chemistry derives from the 1809 chemical affinity theories of German polymath Johann von Goethe who viewed intimate relationships as chemical reactions similar to those occurring between alchemical species in affinity tables.  In modern human chemistry, people are viewed as chemical species, or specifically “human molecules” (a term coined by Charles Galton Darwin), A or B, and processes such as marriage or divorce are viewed as chemical reactions between individuals, such as shown below, respectively:

            A + B —> AB (bond formation)

            AB —> A + B (bond dissolution)

Central to this process is the supposition of the existence of a human chemical bond, “A≡B”, that can be quantified by terms such as bond energy, bond length, enthalpy of formation, Gibbs free energy, etc.  Human chemistry, to clarify, is a more advanced view on the take that good relationships are qualified by an “interpersonal chemistry” of compatible pheromones, hormones, immune systems, neurochemistry, and personalities, etc.

Overview
Human chemistry, in more detail, is the science that studies matter at the atomic to macromolecular to human molecular scale, the reactions, transformations and aggregations of matter, as well as the energy and entropy released or absorbed during these processes. In short, human chemistry studies human molecules and is concerned with the composition and statistical properties of such structures, as well as their transformations and interactions to become the social complexes encountered in everyday life. The physical properties of human molecules, according to modern chemistry, are generally determined by their structure at the molecular or atomic scale, which is itself defined by interatomic electromagnetic forces, and the laws of quantum mechanics and thermodynamics.  The quantum electrodynamic view of human reaction life and evolution, i.e. the valence shell, electron-photon interactions perspective of human bonding viewed through the conception of an interpersonal chemistry are central topics.  The work, energy, and heat aspects of human chemistry are studied in the field of human thermodynamics.  

Each human being, in human chemistry, is defined as a twenty-six-element molecule, no different then any other molecule in the universe.  Life, in this point-of-view, is the evolutionary reaction process between human molecules in which work, heat, and new molecules are products.  Human reaction life, categorically, is a thermally-driven process that occurs over substrate.  Substrate-defined reactions, such as the Haber process, and fluid-medium reactions, such as drug-receptor interactions or protein-protein interactions, thus serve as models of human life, in which molecules move or react along paths of minimum free energy.  Human molecules, as they form bonds, e.g. marriage, friendship, community bonds, weak ties, etc., and break bonds, e.g. divorce, friendship dissolutions, relocations, absent ties, etc., react according to the laws of science, particularly the laws of thermodynamics and principles of quantum mechanics.  States of energy flow into and out of working or non-working coupled human chemical bonds, normally qualified by colloquial terms such as love, hate, like, dislike, and ambivalence, are quantified by exchange force functions of attraction and repulsion.  Human chemistry, in sum, is the science that gives textbook answers to dominant questions such as what is love? (or is love a purely chemical reaction?), what is the morality of divorce?, or why does a person work?, etc.

History
The short history behind the science of human chemistry traces it origins to the studies of the German polymath Johann von Goethe.  In 1809, Goethe wrote the classic novella Elective Affinities the first book on the topic of human chemistry, i.e. reactions between people, who are viewed as chemical species.  In the novella, the central chemical reaction that takes place (chapter four), among others, is a double displacement reaction (double elective affinity), between a married couple Eduard and Charlotte (BA), at the end of their first year of marriage (for each their second marriage), and their two good friends the Captain and Ottilie (CD), respectively:

            AB + CD —> AC + BD (double displacement reaction)

The theory of Elective Affinities is based on the eighteenth century chemical reaction theory of elective affinities (the "force" of reaction) or chemical affinity in the modern sense, and is specifically structured on Swedish chemist Torbern Bergman's 1775, 382-page, chemistry textbook A Dissertation on Elective Attractions.  Goethe, who spent a period of over forty years immersed in the study of chemistry prior to scripting this novella, considered this his “best book”, but stated that its true meaning would remain hidden for a time, only for future generations to uncover.
 
In 1882, to complicate matters, following the development of the new science of thermodynamics, German physician and physicist Hermann von Helmholtz showed that the true measure of affinity between reacting species is chemical free energy (the energy "available" to be converted into system external work), which itself is a function of energy and entropy.  In this direction, the second book on human chemistry was written in 1914 by American marine engineer William Fairburn titled Human Chemistry, in which people are viewed as chemical elements, each defined according to measures of personal energy and entropy, who react together according to the laws of chemistry.

After 1952, with the founding of neurochemistry as a discipline, stemming from series of "International Neurochemical Symposia", of which the first symposium volume published in 1954 was titled ''Biochemistry of the Developing Nervous System'' and following American psychiatrist Michael Liebowitz’s 1983 book The Chemistry of Love, three cover-story articles, namely Time’s February 1993 article “The Chemistry of Love”, National Geographic’s February 2006 article "Love the Chemical Reaction”, and The Atlantic’s March 2006 article “The New Science of Love”, were each instrumental in the development of the public awareness of the science of human chemistry, especially as it relates to love and in particular the top 150 definitions of love:

Recent books to expand on the science of human chemistry include American physician Theresa Crenshaw’s 1996, 340-page The Alchemy of Love and Lust, American anthropologist Helen Fisher’s 2004, 301-page Why We Love – the Nature and Chemistry of Romantic Love, and Gabriele and Rolf Frobose's 2006, 212-page Lust and Love: Is it more than Chemistry?

Human bonding
In terms of developing a foundation of human bonding theories, i.e. the logic behind the 'AB' attachment, several key books have stimulated efforts in this direction; these include John Bowlby's 1969 Attachment (Vol. I-III), Marshall Klaus, John Kennell, and Phyllis Klaus' 1996 Bonding - Building the Foundation of Secure Attachment and Independence, and Warren Miller and Joseph Rodgers' 2001 The Ontogeny of Human Bonding Systems - Evolutionary Origins, Neural Bases, and Psychological Manifestations:

Pre-publication references
• Gladyshev, Georgi, P. (2007) “Leonhard Euler’s methods and ideas live on in the thermodynamic hierarchical theory of biological evolution,” International Journal of Applied Mathematics & Statistics (IJAMAS), Special Issue on Leonhard Paul Euler’s: Mathematical Topics and Applications (M. T. A.), Vol. 11,  Nu. N07, November, 2007. Human chemistry concepts discussed.

• Thermodynamics: General Theory of the Existence (2007) (English) (Russian), International Academy of Creative Endeavors.

• Gladyshev, Georgi, P. (2006). "The Principle of Substance Stability is Applicable to all Levels of Organization of Living Matter", International Journal of Molecular Sciences, (7): 98-110. [URL]. Human chemistry concepts discussed.

Conventions
• Gladyshev, Georgi, P. (2007). The invited and guest speakers. The lecture:  "Hierarchical thermodynamics – general theory of existence and living world development: model of aging and anti-aging quality of foods and medicines." The 15th Annual World Congress on Anti-Aging Medicine & Regenerative Biomedical Technologies, held at the Venetian Hotel, Las Vegas, NV on December 12-15, 2007.  American Academy of Anti-Aging Medicine.  Thims’ human thermodynamics, human chemistry, and human molecule concepts discussed in lecture.

• Gladyshev, Georgi, P. (2006). The invited and guest speakers. The lecture:  "The thermodynamic theory of aging in action: medical nutrition recommendations for patients of any age." The 14th Annual International Conference on Anti-Aging Medicine, held at Stephens Convention Center, Rosemont, IL, July 14-16, 2006. American Academy of Anti-Aging Medicine.  Thims’ human thermodynamics, human chemistry, and human molecule concepts discussed in lecture.

See also
• Human Chemistry - a Human Thermodynamics Wiki
• Buy: Human Chemistry T-Shirt at Zazzle.com ($17.95)
• Love (scientific views) - Wikipedia
• Thermodynamics of love - David Hwang (2001), Journal of Hybrid Vigor, Issue 1, Emory University
• Do People Need Chemistry for a Relationship to Work? - Institute of Human Thermodynamics
• Molecular Evolution Table - Institute of Human Thermodynamics
• Is there such a Thing as a Human Chemical Bond Between People? - Yahoo Answers!