In the 1990s, Colombia reintegrated five left-wing guerrilla groups back into mainstream society after decades of conflict. Education was a big priority - many of the guerrillas had spent their entire lives fighting and were more familiar with the grasp of a gun than a pencil. Reintegration offered them the chance to learn to read and write for the first time in their lives, but it also offered Manuel Carreiras a chance to study what happens in the human brain as we become literate.
Of course, millions of people - children - learn to read every year but this new skill arrives in the context of many others. Their brains grow quickly, they learn at a tremendous pace, and there's generally so much going on that their developing are next to useless for understanding the changes wrought by literacy. Such a quest would be like looking for a snowflake on a glacier. Far better to study what happens when fully-grown adults, whose brains have gone past those hectic days of development, learn to read.
