They all argue that we're pretty close. They're also all selling books. But their arguments are persuasive. One quote from each:
Civil war experts know that two factors put countries at high risk of civil war. The US has one of these risk factors and remains dangerously close to the second. Neither risk factor has diminished since 6 January. The first is ethnic factionalism. This happens when citizens in a country organise themselves into political parties based on ethnic, religious, or racial identity rather than ideology. The second is anocracy. This is when a government is neither fully democratic nor fully autocratic; it’s something in between. Civil wars almost never happen in full, healthy, strong democracies. They also seldom happen in full autocracies. Violence almost always breaks out in countries in the middle – those with weak and unstable pseudo-democracies. Anocracy plus factionalism is a dangerous mix.
Quasi-legitimacy is what leads to violence. And America’s political institutions are destined to become more and more quasi-legitimate from now on. One of the surest markers of incipient civil war in other countries is the legal system devolving from a non-partisan, truly national institution to a spoil of partisan war. That has already happened in the US.
As many white people (Republicans) confront the fear that by 2044 they’ll no longer be in the ethnic majority, they feel the need to take drastic measures to maintain white supremacy. It’s all they’ve ever known. It happened in the 1860s; what’s to prevent it from happening now?
Look for the next civil war to take place after the 2024 election cycle, when the next wave of violence is likely to emerge. Similar to the original civil war, there’s too much at stake for both sides. Then, as now, the threats are existential. In the 19th century, Democrats viewed the newly established Republican party as a threat to their way of life. Republicans, for their part, saw southern intransigence on the issue of slavery as a threat to the union.
Today, Republicans, driven by the existential threat of losing “their” (white) country, will continue their attack on democracy as a means towards preserving America for “real” Americans. Democrats, on the other hand, see the “Magafication” of the GOP as an existential threat to liberal democracy.