““The first result of this randomized trial was predictable from prior studies: in the control group, children with the short variant-i.e., the "high risk" form of the gene- were twice as likely to veer toward high-risk behaviors, including binge drinking, drug use, and sexual promiscuity as adolescents, confirming earlier studies that had suggested an increased risk within this genetic subgroup. The second result was more provocative: these very children were also the most likely to respond to the social interventions. In the intervention group, children with the high-risk allele were most strongly and rapidly "normalized"-i.e., the most drastically affected subjects were also the best responders. In a parallel study, orphaned infants with the short variant of 5HTTLRP appeared more impulsive and socially disturbed than their long-variant counterparts as baseline-but were also the most likely to benefit from placement in a more nurturing foster-care environment. In both cases, it seems, the short variant encodes a hyperactive "stress sensor" for psychic susceptibility, but also a sensor most likely to respond to an intervention that targets the susceptibility. The most brittle or fragile forms of psyche are the most likely to be distorted by trauma-inducing environments-but are also the most likely to be restored by targeted interventions. It is as if resilience itself has a genetic core: some humans are born resilient (but are less responsive to interventions), while others are born sensitive (but more likely to respond to changes in their environments.)””
