ostia's complex economy had brought these shipwrights great wealth.an association with the emperor was designed to protect it. in contrast to simpler systems economic power and even some political influence were now possible for a larger group than ever before. the evolution of economic systems carries with it an enormous impact on people's lives. copan may appear to be a complex city but in economic terms, it was a place of relative simplicity. it was run by a tiny elite who monopolized the best land and used its small surplus for their own benefit. teotihuacan was more a true city, where many craft specialists made products for a vast local and export market. the city's economy evolved to become the most complex in the new world. when transportation is efficient an ancient city can seem almost modern. ostia was such a place -- a place where everyone was a specialist working in an economy that offered the opportunity for social mobility and the creation of wealth. today, archaeologists struggle to reconstruct the economies of the ancient world becaus

from your families for extended periods of time and you will probably at some point live and work in ostia conditions. those types of environments are essential, but unfortunately they present opportunities for predators to put our people at risk and compromise their mission and values. and so, our institution has a particular reason to combat sexual assault. last, we need to recruit the force of the future and sexual assault is an issue for many potential recruits. i was at my old high school a few weeks ago in an auditorium like this talking to students and one of the students asked me about the issue. she asked whether it was safe for her. she wanted to know if it was safe for her to do. i was sorry she had to ask the question. anyway, it is an issue that we can't let sexual assault but our all volunteer force of a less attractive path for the next generation of talented, dedicated individuals that we need. for all these reasons the threat of sexual assault poses to the well-being of men and women, the department of defense has been working on this issue for several years implementing 1