News In eight states, including Guerrero, where these boys were armed to help protect their town from narcos, violence has reduced life expectancy. Narco-violence has reduced Mexicans’ life span by as much as a year 40% of respondents to national survey say they regularly see or hear gunfire Published on Tuesday, May 11, 2021 0share The life expectancy of Mexicans declined by as much as a year between 2005 and 2010 due to violence generated by organized crime groups, according to a new government report. Citing a journal article on the impact of violence on life expectancy, the federal Security Ministry (SSPC) said the amount of time a person can expect to live declined by six months to one year in several states in the five-year period, which coincides with the first years of the militarized “war on drugs” launched by former president Felipe Calderón in late 2006.