When European settlers arrived in North America, they displayed something referred to as a "Frontier Attitude". What was that?

when the americans arrived in North America they explored timber, land, rich soil, clean water, wildlife, and other sources of natural resources that had been used for years by native peoples. However, the European peoples who took the place did not realize that the source of natural resources available would one day become scarce. Thus, during the 1700s and 1800s, most Americans had a frontier attitude, a desire to conquer nature and put its resources to use in the most lucrative manner possible.