Then, as the Cold War and the various phenomena of its fizzling came to a close (e.g. civil wars between Third World countries, Reagonomics, "Bringing the State Back In"), American sociologist John Paul Lederach further refined the concept of peacebuilding through several 1990s publications that focus on engaging grassroots, local, NGO, international and other actors to create a sustainable peace process, especially with respect to cases of intractable deadly conflict where he was actively mediating between warring parties. From a political-institutional perspective, he does not advocate the same degree of structural change as Galtung. However, Lederach's influence in the conceptual evolution of peacebuilding still reflects Galtung's original vision for "positive peace" by detailing, categorizing, & expanding upon the sociocultural processes through which we address both direct and structural elements of violent conflict.