Kurisu's Time Travel Thesis

In the Beta Worldline, Makise Kurisu was inspired to write a Time Travel thesis. Within, she proposes the various ideas that would later form the basis for a semi-functional time machine used by the Russian government prior to nuclear war.

Ownership
Inspired by her father and John Titor's messages from the year 2000, Kurisu took the thesis she had written to Japan, and confronted her father in the Akiba Radio Kaikan. Although she suggested that they submit it under both of their names, her father took offence at sharing credit and attempted to steal the folder. In the ensuing struggle, Kurisu was either intentionally killed by her father or accidentally killed in a botched rescue attempt by an unknown third party.

Makise Shouichi took the thesis for his own and ran from the scene, using it as leverage to defect to Russia.

Aftermath
In the Beta Worldline, possession of the thesis by Russian government officials led to a brief cold war-esque struggle between the US and Russia, resulting in the outbreak of Nuclear war. During the pseudo-cold war, attempts at gathering all data on Kurisu using any means, including time manipulation, led to a brief return to the Alpha Worldline.

In the Steins;Gate Worldline, the Thesis was burned in a freak fire on the way to Russia. Although Shouichi attempted to recreate it, he proved unable, and was soon turned on by the Russian government he wished to defect to.