you went to the university of pennsylvania after graduating from bryn mawr with a history degree, thenou became a history professor. drew: i was a student activist in college, very involved in politics, civil rights issues, vietnam war protests, and cared a lot about changing the world and having an impact on the world. when i graduated from college i worked in the department of housing and urban development, and i hoped in an idealistic way to move into maybe urban planning or some area that would enable me to carry on my concerns about public service and changing the world. but i so missed intellectual life and ideas and the kind of debate that is at the heart of a university, so i applied to graduate school and went back and got a phd at penn, which eventually led me to a faculty position at penn that i held for 25 years. emily: you wrote six books. tell me about that. drew: i became a historian of the american south. i began to explore questions, not all that distant from questions that i asked as a young child growing up in a segregated society. my first book was about people who

i wasn't familiar with her even though i have some familiarity with bryn mawr college where she was on the faculty . >> she died about two years after she escaped the nazis. >> i was wondering whether you had any other examples that you could tell us quickly of where a conservation law sort of goes along with a particular variance principle. for example, you mentioned conservation of energy, that was the example you may but that same correspondence, conservation of matter? >> that would be mass energy, all under the conservation of energy. another good example would be in variance under spatial translation is equivalent to conservation of momentum. in variance under regular orientation is equivalent to conservation of angular momentum but there are also lots of internal symmetries that comprise the conservation principle if you explore the standard model of particle physics and now we are getting into the waters but it's a very general principle and it's a supreme utility, if you're doing physics that goes beyond quantum mechanics, this beautiful idea to emmy noether is one of the most

an early political scientist is a professor at bryn mawr wesley admin princeton. he was also the greatest public speaker of his time. he's an adoring husband and father. it's really wonderful to read his letter to his first wife and his children's memories of him. he was a sole support. he had a lot on his shoulders. a sole support not just of his wife and their three daughters, but this parade of relatives who were always turning up meeting hall. woodrow was the only wilson who really made good. so everybody else counted on him for financial support for years at a time in some places yet he never complained about this are talked about it. we only know about it because his wife alan mentioned this in a letter to someone else. he was not a warm, extroverted guy. he was very courteous and unusually thoughtful. one of my favorite stories about this is the summer of 1914, his wife had just died. world war i had just begun and the family had rented a summer house in new hampshire. so he went up there and his friend u and confidant came to visit him and will send -- the

it was kind of like finding an essay competition at bryn mawr or kenya. of course you're coming up with a clever way of saying yes. but it's about the arts and sciences, have they made it better? and russo looks at this and he has basically, a road to damascus moment. and he passes out, he wakes up transient his own tears and a bit of a drama queen. and it occurs to him all of a sudden, this is basically the essence of his view. we have it entirely backwards. and it's very much sort of inspired by bringing in this christianity, he has a sort of classic religious tail that we started in the golden age. the golden age of savages where we are rugged, where individuals, totally not true. and society is corrupted us. and science corrupts us and man is born free but everywhere he is in change. and the person who put up the fence protecting his property saying this is mine, was a first basically the original sin of mankind is private property. very different than locke. and so russo whole orientation and why they say he's the father of romanticism, i think other

ernie cecelia bryn mawr trust joins us ernie, everyone can find in numbers.re lies, damn lies and there are statistics but to me the overall economy is showing very broad-based and nice, strong, in every sector showing a lot of treatment. with the consumer numbers, i can't see anything that will really knock it off, barring some big black juan event? >> ashley, to your point, we would agree the economy is doing very well, a strong second quarter, 4% growth. third quarter will come in with at least three plus percent growth. consumer confidence is very strong as you point out. what is very interesting to us we've had a good period of time, going back to the fourth quarter of 2016 where we had corporate earnings growing at a very nice clip. even in most recently completed second quarter and earnings season is pretty well reporting season is pretty well long in the tooth, we have earnings growing at 25% year-over-year, the top line, sales line if you will, growing at 10%. we think valuations are very reasonable but we also think valuations have to be carefully m