Fukuyama used Hegel's idealism to prove his point of view. He believes that the historical development of mankind is fundamentally driven by people's need to seek "recognition", and the liberal democratic society has met people's need to seek "recognition", so history ends here.
It should be noted that the above is a view of the final conclusion of history, which has not been confirmed by facts, but has been refuted by history. The true situation of the final conclusion of history needs to be observed and understood according to the later historical development and social science progress.