Complex sentence: Although the culture of Idaho is reflective of the broader culture of the United States to some extent, some of the forces that have shaped the culture of Idaho are ethnographic, geographic, and historical in nature.
Split into simpler sentences: Although the culture of Idaho is reflective of the broader culture of the United States to some extent, a few distinct influences should be noted. Some of the forces that have shaped the culture of Idaho are ethnographic, geographic, and historical in nature.