adam millsap: it can restrict the growth of that area, increase the price of housing and make it difficult for neighborhoods and communities to adapt as the situation around them changes. ali rogin: economist adam millsap is a senior fellow at stand together trust, a philanthropic organization funded by billionaire charles koch. he says he's not opposed to all historic preservation. adam millsap: i think i's more about how it can be misused, but i think that's where you run into problems and you just start preserving things for a variety of reasons that don't necessarily have to do with preserving history, but might be done for other purposes. alison king: we're in marlon grove, which was designed by ralph haber in the mid-1950s. ali rogin: allison king says not every piece of modern architecture can or should be saved. but she and other preservationists believe arizona's laws make it harder to protect historic buildings. that includes a 2006 measure that strengthened the rights of property owners when faced with government attempts to take private property for public use. what's known as