“Out of many… one”
At the time of the American Revolution, this phrase appeared regularly on the title page of the London-based Gentleman’s Magazine, founded in 1731, which collected articles from many sources into one periodical.
The motto serves as a terrific reminder for the basic relationship between the autonomy of the States and how Federal Law is often developed when there is a momentum consensus of the Will of the States.
Ticking off passage at the State level serves great purpose, and lobbyists of any kind, even just the seriously interested citizens, have the ability to act locally and ultimately influence the national policy. The problems get worked out; the regulations get tweaked against the law of unintended consequences; and the fear-mongering who forecast the end of civilization-as-we-know-it get a chance to see that the sun still rises and sets.
Case in point: Same-Sex Marriage
In 1995, there were a handful of legal bans (state-level) and no constitutional bans (state-level). In the years through the first same-sex marriage approval in Massachusetts (2003), the number of legal bans had gone up by the factor of 7. The next year, almost half of those bans were solidified as constitutional bans. The State-to-Federal strategy was clear and visible. Ten years later, the momentum had shifted, and the Federal adoption happened in 2015.

I mention this case because there has been another state-by-state change happening, and I can simply not recall a single time in the last 20 years that anyone has been talking about it. Surely our elected officials all know about this.
Case in point: Concealed Carry
I had no prior knowledge about “open” and “concealed carry” and the licensing requirements in the US, and its history. My impression was just so far from the facts!
There are basically 4 levels of permissiveness used for concealed carry: (1) not allowed, (2) may be permitted (license), (3) shall be permitted (license), and (4) allowed.
Vermont has been at level 4 since the 1700s. In the mid 1980s, 41/50 states where at levels 1 and 2. By 2006, that number had inverted: only 11/50 at levels 1 and 2, and 2 states at level 4 (Vermont and Alaska). From 2010-2019, the number of states at level 4 has increased to 16; the number at level 1 went to 0 in 2013, and only 8 states remain at level 2.

Remember what I said before?
Ticking off passage at the State level serves great purpose, and lobbyists of any kind, even just the seriously interested citizens, have the ability to act locally and ultimately influence the national policy. The problems get worked out; the regulations get tweaked against the law of unintended consequences; and the fear-mongering who forecast the end of civilization-as-we-know-it get a chance to see that the sun still rises and sets.
What happens when there are actual problems that result, when there are people for whom the sun no longer rises, when the fear was warranted? Let’s look at the number of mass shootings in the US (as defined by “Mother Jones”).

Correlation is not causation; otherwise we might claim that the increase in mass shootings is related to the legalization of same-sex marriage. Not that there are not people who have tried, I suppose. But there is such a thing as face-validity, when a correlation makes sense. Is the experiment with concealed carry yielding data that ought to be attended to? Because certainly, just like with same-sex marriage, there is a community of people who are taking advantage of E Pluribus Unum– as the center of legal mass for carrying weapons has long since shifted, and unlicensed carry is now growing. When does this get deemed to be the will of the States and become Federal Law?
Here is one last correlation to consider:
