Say he makes last minute plans to accompany Ferdinand on his state visit to Sarajevo, and gets assassinated in Ferdinand’s place.

How would this change WW1 and the fate of Austria-Hungary when Franz Ferdinand immediately becomes emperor?

In 1955, after a power struggle with Nikita Khrushchev over control of the USSR, Georgy Malenkov was deposed. In 1957, after an attempted coup to regain power, he was outright removed from the Praesidium and spent the rest of his life in obscurity. Yet whilst he was Premier, he was attempting industrial reforms to focus on consumer goods and quality of life - it's an interesting idea that a more technocratic reformer was denounced as a 'rightist'.

Let's place this at the start of his tenure (so that his triumvirate with Beria and Molotov remains intact) in 1953 - what if Malenkov secures his grip on power before Khrushchev makes his own gambit? Does he get the chance to institute reforms? Does Beria depose him instead?

My question is that of the printing press never being invented, this could come from any number of ways like Gutenberg being stillborn to the first printing press being destroyed by the church, although it doesn´t really matter how the printing press is destroyed or never created in the first place.

I understand Nathaniel passed from illness which damaged the progress but what if he survived and continued the battle? How would that shape American culture and race politics?