The principles upon which the nation was founded allowed individuals to claim land.
This became private property.
Even land claimed by the federal government was allowed to be used as stated in the post.
You're mistaking what you wish were true for American history, PC.
Most of the land not in the original colonies came to the USA via the Federal government.
The most obvious examples of that are the Louisiana Purchase and Sewards so called folly, Alaska.
This is not the case today.
Obviously not.
The fact that the powers behind the attempts at confiscation do not have the right to simply claim ownership is shown by their need to fabricate reasons to take over private property.
Clearly true. (whether or not their reason is a "fabrication", too, I note)
One example:
1. The Spotted Owl (Strix occidentalis) is a species of true owl. It is a resident species of old-growth forests in western North America, where it nests in tree holes, old bird of prey nests, or rock crevices….The International Union for Conservation of Nature (IUCN) Red list status for the Spotted Owl is Near Threatened with a decreasing population trend….. In February 2008, a federal judge reinforced a U.S. Fish and Wildlife Service decision to designate 8,600,000 acres (35,000 km2) in Arizona, Utah, Colorado and New Mexico as critical habitat for the owl. Spotted Owl - Wikipedia, the free encyclopedia
a. Ten years of research and more than 1,000 published studies detail the threats to its survival, but there's still no sure way to stop its decline. Saving the Spotted Owl : NPR
2. What is the cost of ‘saving’ the bird, and what’s the reason? Have organism’s become extinct? And the result? “From the environmentalists' perspective, the benefits of preserving the northern spotted owl and its habitat far outweigh any of the costs….society ought to preserve this species and the unique ecosystem it represents because of their aesthetic value. “Ethics and the Environment: The Spotted Owl Controversy
3. The Spotted Owl campaign, as is so very many other environmental campaigns, a deceit. It is a way of advancing the real agenda, confiscating property, making land off-limit, and eliminating any human presence. No matter the cost. No matter the result.
Sure I can understand your vexation with d eminent domain condemnations of private property for dubious reasons.
Who can't?
Each case ought to be decided on its merits.
Or are you objected to the entire concept of eminent domain takings?