Answer:
World War II
The road to war
After World War I most Americans concluded that participating in international affairs had been a mistake. They sought peace through isolation and throughout the 1920s advocated a policy of disarmament and nonintervention. As a result, relations with Latin-American nations improved substantially under Hoover, an anti-imperialist. This enabled Roosevelt to establish what became known as the Good Neighbor Policy, which repudiated altogether the right of intervention in Latin America. By exercising restraint in the region as a whole and by withdrawing American occupation forces from the Caribbean, Roosevelt increased the prestige of the United States in Latin America to its highest level in memory.
hope its help
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Ernest Rutherford contributed to the atomic theory by discovering that the atom is mostly empty space.
He can to that conclusion because he fired alpha particles at gold foil, which was so thin that it was only around .00004 cm thick, and while almost all shot straight through, some actually bounced back!
He likened it to shooting a 15-inch round(bullet) at tissue paper, only to have it bounce right back at you! Based on this, he theorized that the atom is mostly empty, which is why a majority of the particles passed right through, but in the very center of the atom there is a super-dense structure called a nucleus that held a majority of the atom's mass. This super-dense mass would be more than massive enough to deflect the particle, should they collide.
Answer:
Mesoamerican civilizations
Explanation:
Because they preceded their arrival in Mexico, especially Teotihuacan and Tula people.