At what stage in u. s. trade history did protectionism reach its high point?

According to Carbaugh (2009), in US trade history protectionism reached its high point, in 1828 with the opening of Tariff of Abominations. “This measure amplified duties to an average level of 45 percent, the highest in the years prior to the Civil War, and triggered the South, which wanted low duties for its imported manufactured goods” (p. 183). Average tariff rate in 1890 under McKinley law was 48.4%.Tariffs were augmented extremely during Civil War as a means of paying for it.

i need to see the answer to answer the question

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.