There is a strong connection to depersonalization, emotional numbing, as well as dissociation from one's identity. This shows the shift of psychic numbing from a collectivist view to an individualistic view. Robert Jay Lifton spearheaded the psychic numbing movement and his concentration was on a much larger scale. Psychic numbing is about the way a culture or society withdraws from issues that would otherwise be too overwhelming for the human mind to comprehend. In this respect, psychic numbing is a societal reaction to impending doom, chaos, and ultimately mankind's extinction. Paul Slovic, a prominent psychologist in the realm of risk, maintains the original interpretation posited by Lifton. Slovic's article, "Psychic Numbing and Mass Atrocity", returns to the collectivist model and most notably confronts the value of saving a human's life. The figures to the right denote both arguments for the hypothesized value of saving a human's life as well as the true value of saving a human's life established through Slovic's empirical research. Slovic introduced the concept of "psychophysical numbing", which is the diminished sensitivity to the value of life and an inability to appreciate loss. Essentially, the "proportion" of lives saved is more important than the "number" of lives saved. One of Slovic's arguments for this outcome is that people suffer from innumeracy and cannot comprehend the emotional connotation associated with large numbers. The threshold, as stated by Slovic, where people cannot comprehend the emotional magnitude of the loss of life is two, as shown in the figure. Slovic also points to Weber's law, which states the difference between two stimuli is proportional to the magnitude of the stimuli. Additionally, Weber's law focuses on the just-noticeable difference between the two stimuli. Slovic addressed Weber's law from a different context - he considered the magnitude and value of a human life. Slovic took Weber's law and incorporated prospect theory, which is decision making based on potential gains and losses, not the actual final outcome. Slovic found that when prospect theory and Weber's law are analyzed in regards to human life, the value of saving human lives is greater for a smaller tragedy than for a larger one. These are all considered collectivist views of psychic numbing because they encapsulate a general theory of mind held by the majority of citizens in a society. Additionally, these views remain consistent with the original concept of which collective avoidance and attention withdrawal becomes the active state of mind in regards to potential threats of mass extinction.