So: 35 of the 50 states were created by Congress out of pre-existing federal lands. Most of the federal estate today consists of lands the federal government has always owned and that were retained at the time of statehood. In addition, much smaller tracts have been purchased (or donated by private owners) over the years for various purposes. Many of the Civil War battlefields now owned and managed by the National Park Service, for example, were acquired by purchase and donation, but the acreage involved in such sites is dwarfed by the lands retained by the federal government at the time of statehood.
The real argument is whether the federal government should have deeded all public lands over to the various states at the time of statehood. This has never been done automatically. Remember that in the early federal period, the ongoing sale of federal lands to the public was a major source of federal revenues (along with tariffs). What happened in the 1880's, however, was that the arable lands had largely been sold, and the remaining federal estate was largely in the desert and mountain west (and later in Alaska) where yeoman agriculture was no longer the driving interest. Congress realized that timber, mining, and grazing interests were the primary drivers, and that huge tracts of federal lands were now being acquired for a song by large corporate interests, not the pioneer families of historical memory. Congress balked at selling millions of acres at a time to the robber barons, so it shifted to a leasing orientation.
Western lands advocates argue that these lands should be shifted to state ownership. That is a defensible argument, but it would take an act of Congress. These lands have always been federally owned.
P.S. I left out the acquisition of the present day American southwest from Mexico. The principle holds: Arizona, New Mexico, Nevada, and California were first federal estate, with the later states being created by Congress. Not the other way around.
I remember the early days of Reagan, when he was trying to sell off federal lands. The Left had a cow and I wondered back then what the big deal was...since the the management of the lands seemed to be reasonable.
But now, after Clinton and Obama LOCKING UP much of those lands, I see that the Left was thinking long term the whole time...and needed Reagan to back off so that the lands would be available when the stars lined up (Obama and Clinton’s terms).
The only option is for the feds to get their hands off the lands. Ideally, give them over to private hands, but certainly states. The feds do have a right to some lands, such as on the border, military bases, etc., and I don’t mind them keeping most of the older national parks - but the rest of the land simply NEEDS TO GO.