Hoover was a Republican and during the 1920's that meant little government interference with the economy. He was following the common practice of his political party for the time. Also, based on previous panics and recessions, the government didn't have to interfere because the economy naturally saw booms and busts in the economic cycle. It was believed that this economic bust was a normal decline and with reinvestment by the wealthy the economy would bounce back.
People arguing for government interference suggested that the depression was worse and different than other panics experienced before this. No one was reinvesting in the economy because they had lost too much or were not willing to trust the system. It was argued that government spending was needed to get the economy started again and then the debt the government gained from economic investment would be paid back with increased taxes when the economy turned around.
It allowed ideas to spread faster
The antislavery movement raised and grew because people kept finding reasons for why slavery is bad. This eventually led to conflict between people against slavery and people for slavery. Another reason why the antislavery movement raised and grew was because slavery has become less useful overtime, as we have machines.
They sent in Contras, Right-wing American forces, to Nicaragua despite it being illegal at this point through the Boland Amendment. This also exposed to Iran-Contra scandal when America and Iran had trade weapons to support each other.
