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Does the MAOA gene help explain why blacks are more violent than whites and Asians?


People who have a shortened MAOA gene do not produce a protein needed to break down old serotonin in their brains. These people are more likely to be agitated, aggressive, and impulsive.

Comprehensive Psychiatry published a large study on the rates at which black and white Americans carry shortened, or dysfunctional, MAOA genes.

The gene can come in the form of 2, 3, 3.5, 4, or 5 allele. A 3-repeat allele is considered dysfunctional and is what is referred to as the “warrior gene” in the video below. A 2-repeat allele is considered very dysfunctional. People with a 2-repeat allele MAOA gene have a permanent chemical imbalance in their brain making the person more likely to be agitated, aggressive, and impulsive.

According to the study published in Comprehensive Psychiatry, 34.6% of whites and 53.4% of blacks have 2-repeat allele or less. However, only .5% of whites have the 2-repeat allele version compared to 4.7% of blacks.

That means blacks are 9.4 times more likely to have the extremely dysfunctional version of the gene than whites. Considering that black Americans are 9 times more likely to commit murder, this is very significant.

Other studies have shown even higher rates of occurrence of the 2-repeat allele version of the gene in blacks. Other studies show that the 2-repeat allele version is almost completely non-existent in Asians.

Notes: There are other genes associated with violent and/or impulsive behavior. The MAOA gene is only one of them. However, the effects of a shortened MAOA gene are well documented. The chemical imbalance its creates can be observed in a laboratory.

The term “warrior gene” could be considered a propaganda term to put a positive spin on those who possess the dysfunctional versions of MAOA.

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