North American Conservation Model

The North American Conservation Model was founded by early 20th century conservationists like Roosevelt, Pinchot and Grinnell and has always been an evolving continuum. First came the protections, then major funding wins in the 1930s, then public input in the 1960s & 70s. What can we learn from the first three or four generations of conservationists, how do we modernize funding and where do we go from here? Thanks for listening.