Had to stop reading halfway through, where have they shown a causal link between a reduction in gun violence and an increase in gun control? There were numerou

Had to stop reading halfway through, where have they shown a causal link between a reduction in gun violence and an increase in gun control? There were numerous incidences of violence under the assault weapons ban and it's not clear to me that the frequency has increased since the ban expired. Also, there is a neglected third use of firearms for sport shooting. While the authors overal point regarding Google Glass is something I agree with his way of going about getting there reeks of propaganda for gun-control. Can we cleanly separate the two issues or at least take an unbiased approach to both?