But the years that followed have done little to narrow the list of likely precursors. Rather, the murky science seems to imply that nearly anyone is a potential terrorist. Some studies suggest that terrorists are likely to be educated or extroverted; others say uneducated recluses are at risk. Many studies seem to warn of the adolescent condition, singling out young, impatient men with a sense of adventure who are “struggling to achieve a sense of selfhood.”
Such generalizations are why civil libertarians see only danger in government efforts to identify people at risk of committing crimes. Researchers, too, say they have been frustrated by both the Bush and Obama administrations because of what they say is a preoccupation with research that can be distilled into simple checklists, even at the risk of casting unnecessary suspicion on innocent people.
