Who did more long-term damage to the United States and World?

[Big Abraham]

Trump has done the least damage of all three by far.

Reagan did more than anyone else to shift the nation rightward inaugurating a renaissance of conservatism, undoing decades of labor progress, and permanently shifting the balance of power to overseas manufacturers, in addition to the many offensive and illegal wars which he waged. He also, if anything, helped prolong the Cold War, rather than hastening its demise (which also erased the necessary balance of power between the nations).

George Bush orchestrated the ill-fated “war on terror” which has lasted to this day, massively de-stabilized the strategic Near East and consequently the whole world in pursuit of Arab oilfields (not to mention untold war crimes and an increase in Islamic militarism), and also laid the foundations for the massive overarching surveillance state that was expanded upon by Obama, and which has kept law-abiding citizens continually paranoid and even leas free than the corporate overlords had previously permitted them to be.

Trump did not challenge the Reaganite neoliberal system in any meaningful way, nor did he deviate seriously from the doctrines of the Bush administration (although he sometimes did in both cases in rhetoric), but neither has he ordained an edifice of politics, military, or economy nearly as odious and hostile to the entire world, and on that front alone, he far outranks the other two.