Gustav Fechner
Fechner, along with Wilhelm Wundt and Hermann von Helmholtz, is recognized as one of the founders of modern experimental psychology. His clearest contribution was the demonstration that because the mind was susceptible to measurement and mathematical treatment, psychology had the potential to become a quantified science. Theorists such as Immanuel Kant had long stated that this was impossible, and that therefore, a science of psychology was also impossible.
Norman Farberow
Norman Louis Farberow (February 12, 1918 – September 10, 2015) was an American psychologist, and one of the founding fathers of modern suicidology. He was among the three founders in 1958 of the Los Angeles Suicide Prevention Center, which became a base of research into the causes and prevention of suicide.