I cannot deny that the movie "Mudbound" is a sentimental and thought-provoking period drama. But at the same time, I have to point out that the buildup, or the first act is really overlong, lasting for more than an hour. The central figures in the film are Jamie and Ronsel, who served in the US military and are against racism. But their story only starts after the one hour mark, at which point the audience get bored and tired. The film would be much improved if the buildup were shortened.