Goodness, you obviously think yourself of superior intellect, surely you can find research on you own:
Lithium (Li)
by Alexander G. Schauss, Ph.D
"…An important physiological benefit of Li in humans was first reported in 1949. A researcher named Cade found that Li in the form of “lithium carbonate” helped patients with a type of mental illness called manic-depression. 11 12 Today, after years of study, lithium carbonate is widely used as a therapeutic drug for this condition at prescription doses ranging from 100 to 1,800 milligrams per day. This level of intake is at least 50 times greater than the level some believe may be the daily required intake of this element to maintain health 8, or more than 100 to 2000 times the level of lithium found in naturally rich sources of Li such as springs artesian wells or certain mineral-rich inland salt waters.
By the mid-1970’s an additional role was found for Li in human health, when it was suggested that Li may play a protective effect in treating sodium imbalances that contribute to atherosclerotic hear chloride (table salt). reduces hypertension in hypertensive patients. Recently researchers have found that Li’s beneficial effect on slat imbalances may be due to the way in which Li is metabolized differently in the body than Na or K.
Some epidemiological surveys have also suggested that Li may be associated with a lower incidence of dental cavities. Population studies in Ohio, Papua-New Guinea and New South Wales, Australia, suggest that Li has an inverse association with dental caries and is a possible cariosstatic (caries preventing) trace element. 15
During the early 1970’s another very important discovery was made that is still being studied today. Researchers in Texas discovered that the levels of lithium found in water was inversely associated with the incidence of admissions and readmissions of patients for psychoses, neuroses, and various personality disorders in 27 Texas state mental hospitals. Doubting their own research findings, they conducted a second more thorough study two years later. In the second study, the researchers not only confirmed their earlier findings but they found that homicide rates were inversely correlated with the lithium levels in drinking water.
However, in both studies the incidence data was only collected for a period of two years. Therefore, two longer periods were studied by independent researchers at the University of California and the University of Oriente in Venezuela. In the first study, the incidence of suicide, homicide, and rape were studied over a five year period. 16 In the second study, the incidence data included many more offenses over a ten year period. 17 Using data from both of these studies, it was found that the incidence rates of suicide, homicide and rape were significantly higher in countries whose drinking water supplies contained little or no lithium than in countries with water lithium levels ranging from 70 to 170 micrograms per liter; the difference remaining statistically significant after considering such factors as population density. The corresponding association with the incidence rates of robbery, burglary, and theft were also statistically significant. Comparisons of drinking water lithium levels with the incidence of arrests for possession of heroin, cocaine, and their derivatives also produces statistically significant inverse associations.
These results suggest that lithium has moderating effects on suicidal and violent criminal behavior at levels that may be encountered in municipal water supplies. The authors of these long-term studies concluded that: “lithium at low dosage levels has a generally beneficial effect on human behavior, which may be associated with the functions of lithium as a nutritionally-essential trace element. Subject to confirmation by controlled experiments with high-risk populations, increasing the human lithium intakes by supplementation, or the lithiation of drinking water, is suggested as a possible means of crime, c\suicide, and drug-dependency reduction at the individual and community level.” The researchers suggested that a Li dosage level of about 2 milligrams a day considered as the dose effective in lowering the incidence of aggressive and/or self-destructive behavior.
The biochemical rationale for these profound finding have been studies extensively by other who have found that Li can control episodic outbreaks of rage among prisoners, suppress cocaine-induced hypersensitivity reactions, and decrease the distractibility associated with irrelevant stimuli. Studies have also previously shown that in humans Li can prevent behavioral alterations due to social isolation and confinement."
Also, are you certain that we are not altering our biochemical structure permanently and that this is not causing disturbances of a psychological nature in successive generations, or are you guessing?