Relationship Science is nothing new. Here are links to notable contributors to the field over the last 2500 years. (Psychologists, Psychiatrists and philosophers)
Hippocrates (460-370 BC)
Galen (AD 131-200)
Avicenna (980-1037)
Nicholas Culpeper (1616-1654)
Immanuel Kant (1724-1804)
Rudolf Steiner (1861-1925)
Alfred Adler (1879-1937)
Erich Adickes (1866-1925)
Carl Gustav Jung (1875 –1961)
Dr. William Moulton Marston (1893 – 1947)
Isabel Briggs Myers (1897 – 1980)
Eduard Spränger (1914)
Ernst Kretschmer (1920)
Erich Fromm (1947)