What does history actually say about whether this can stay peaceful?

History says peaceful separation is the modern norm, and violent separation is the exception that happens when one side refuses to negotiate. The fear that Texas independence must mean conflict rests almost entirely on a single nineteenth-century example, the American Civil War, while the actual record of the last hundred-plus years points overwhelmingly the other way. Peace is not the hope here. It is the pattern.

The fear rests on one example, and it is the wrong one

When people assume independence means war, they are picturing one event: the Civil War of 1861 to 1865. We have to be clear-eyed about it. That war was bound up with slavery and was carried out by conventions and armies, not by a vote of the people. It is the very thing Texas independence is not. Resting a prediction about a peaceful, lawful, twenty-first-century referendum on a war fought over slavery is a category error. It reaches past every relevant modern example to grab the one that frightens. We do not defend the Confederacy, and we do not accept it as the template for what we propose.

The modern record runs the other way, repeatedly

Set the Civil War aside and look at what has actually happened since. Norway and Sweden dissolved their union by vote and negotiation in 1905, with no war. Czechoslovakia split into two prosperous democracies in 1993, so calmly it was called the Velvet Divorce. The Soviet Union, a nuclear superpower, came apart into fifteen nations in 1991 without a civil war. Britain voted to leave the European Union in 2016 and negotiated its exit. Scotland and Quebec held independence votes that their parent countries agreed in advance to honor. Over and over, in the modern era, peoples have separated peacefully. The violent exception is rare, and it has a cause.

War comes from refusing to negotiate, not from separating

This is the heart of what history teaches. Separation itself does not cause war. Refusing to let people go causes war. Where one side meets a clear, peaceful expression of self-government with a willingness to negotiate, the outcome is peaceful, every time. Where one side answers with force, you get conflict, and the side using force is the one that chose it. The question for Texas, then, is not really whether Texas will be peaceful. The movement has committed to a lawful, peaceful, democratic path from the start. The question is whether Washington would answer a peaceful vote with negotiation or with force, and history says a constitutional republic founded on consent has every reason to choose the table.

The order to use force could not be carried out anyway

There is a practical floor under all of this. Even setting principle aside, a violent federal response to a peaceful Texas vote is not realistic. It would mean turning the armed forces against American citizens who had done nothing but vote, in a state where more than two hundred thousand of those service members are themselves Texans. It would invite condemnation and economic damage around the world. The forces that hold a peaceful separation to the negotiating table, consent, self-interest, and the watching world, are exactly the forces that made the modern record peaceful. They apply with full weight to Texas.

The international rules now favor the peaceful path

History did not just produce peaceful examples. It produced rules. Since 1945, the right of peoples to self-determination has been written into the United Nations Charter and into treaties the United States itself signed. The world's high courts have moved the same direction, holding that a declaration of independence breaks no international law and that a clear majority on a clear question creates a duty to negotiate in good faith. The legal and moral current of the modern world runs toward resolving these questions peacefully, at the table, by consent. That is the current Texas is swimming with.

The bottom line

History says peaceful separation is the norm and war is what happens when one side refuses to negotiate. Texas has chosen the peaceful, lawful path, the modern record is overwhelmingly on that side, and every incentive points Washington toward the negotiating table rather than the battlefield.