Question: Which historian held positions in the oldest independent private university in the Rocky Mountain Region of the United States?

Context paragraphs:
International School of Denver: The International School of Denver (formerly the Denver Montclair International School) is a private school located in the Lowry neighborhood of Denver, Colorado, United States.  It offers accredited, full language immersion in French, Spanish and Mandarin The Middle School is an International Baccalaureate Candidate School implementing the Middle Years Programme in grades 6 - 8.  It is the oldest international school in the Rocky Mountain region.

Southern Rocky Mountain Front: The Southern Rocky Mountain Front is an elongated geographic region located along the eastern and southern face of the Southern Rocky Mountains in the U.S. states of Wyoming, Colorado, and New Mexico.  The region comprises the southern portion of the Rocky Mountain Front geographic region of Canada and the United States.  The Southern Rocky Mountain Front had a population of 5,467,633 according to the 2010 United States Census.  The region is one of the fastest growing regions in the United States and its population is projected to grow by 87% to 10,222,370 by 2050.  In 2005 the GDP of the region was $229,202,000,000 making up 2% of the United States GDP.

Rocky Mountain Horse: The Rocky Mountain Horse is a horse breed developed in the state of Kentucky in the United States.  Despite its name, it originated not in the Rocky Mountains, but instead in the Appalachian Mountains.  A foundation stallion, brought from the western United States to eastern Kentucky around 1890, began the Rocky Mountain type in the late 19th century.  In the mid-20th century, a stallion named Old Tobe, owned by a prominent breeder, was used to develop the modern type; today most Rocky Mountain Horses trace back to this stallion.  In 1986, the Rocky Mountain Horse Association was formed and by 2005 has registered over 12,000 horses.  The breed is known for its preferred "chocolate" coat color and flaxen mane and tail, the result of the relatively rare silver dapple gene acting on a black coat, seen in much of the population.  It also exhibits a four-beat ambling gait known as the "single-foot".  Originally developed as a multi-purpose riding, driving and light draft horse, today it is used mainly for trail riding and working cattle.

Robert Earl Roeder: Robert Earl Roeder (16 May 1931 – 15 November 1998) was a historian and academic administrator who was one of the founders of the World History Association.  He was also a founder of the American Issues Forum of the American Bicentennial.  Roeder held positions at Harvard, the University of Chicago, and the University of Denver.

Rocky Mountain EAA Regional Fly-In: The Rocky Mountain EAA Regional Fly-In is an annual gathering of aviation enthusiasts held each summer at Front Range Airport near Aurora, Colorado.  It is held just prior to the national fly-in held at Oshkosh, typically in mid to late June, and serves the same purpose specific to the Rocky Mountain region.  Likewise, it hosted by the Experimental Aircraft Association and therefore the focus is on kit-built aircraft, although enthusiasts and interests concerning general aviation and military aircraft are also in-force.  Because the Rocky Mountain EAA Fly-In is region-specific and lacks the national attention of the Oshkosh event, the focus tends to lean more towards the general attendees and the aircraft they had brought with them, rather than on vendors, manufacturers and aviation and national celebrities such as Burt Rutan (although their presence is still heavily felt).

Rocky Mountain Floristic Region: The Rocky Mountain Floristic Region, also known as the Rocky Mountain Floristic Province, is a floristic region within the Holarctic Kingdom in western North America (Canada and the United States) delineated by Armen Takhtajan and Robert F. Thorne.  The region extends from Kodiak Island in Alaska to the San Francisco Bay Area and Sierra Nevada in California.  The Vancouverian Province comprises the coastal part of the region for its entire length, including the Pacific Coast Ranges, and the Rocky Mountain Province includes the Rocky Mountains and associated ranges.  There are no endemic plant families in the region but many endemic genera and species.

Rocky Mountain Animal Defense: Rocky Mountain Animal Defense (RMAD) is a U.S.-based non-profit 501-C-3 organization that helps eliminate the human-imposed suffering of animals in the Rocky Mountain region.  The group was formed in 1994.  RMAD furthers its mission through public education, community outreach, litigation, legislation and hands-on work.  As of May, 2010, the group was renamed Rocky Mountain Justice for Animals under the leadership of Executive Director Karen Breslin.

AT&amp;T SportsNet Rocky Mountain: AT&T SportsNet Rocky Mountain is an American regional sports network that is owned by the AT&T Sports Networks subsidiary of AT&T Inc., as part of the AT&T SportsNet brand of networks, and is an affiliate of Fox Sports Networks.  Headquartered in Denver, Colorado, the network broadcasts regional coverage of sports events throughout the Rocky Mountain region, mainly focusing on professional sports teams based in the Denver metropolitan area and Nevada.

University of Denver: The University of Denver (DU) is a coeducational, four-year university in Denver, Colorado.  Founded in 1864, it is the oldest independent private university in the Rocky Mountain Region of the United States.  DU enrolls approximately 5,600 undergraduate students and 6,100 graduate students.  The 125 acre main campus is a designated arboretum and is located primarily in the University Neighborhood, about five miles (8 km) south of downtown Denver.

Nan Desu Kan: Nan Desu Kan (NDK) is an annual three-day anime convention held during September at the Sheraton Denver Downtown Hotel in Denver, Colorado.  The convention is the largest anime convention in the Rocky Mountain region and each one takes eighteen months to plan.  Its name in Japanese roughly means "nan desu ka" (何ですか ) , "what is it?" .  The parent company, Rocky Mountain Anime Association, is a registered 501(c)(4) nonprofit organization.

Supporting paragraphs: Robert Earl Roeder University of Denver
Answer: Robert Earl Roeder