This is a rather long story that basically spans most of Earth's history. In order to understand where the continents came from we have to go back to about the beginning. As our solar system formed rocky and metallic asteroid began to collect in the part of the solar nebula to for Earth.
As these bodies came together to form our planet, the heat of their impacts eventually cause Earth's surface to melt. This created a magma ocean. As this magma ocean began to cool Earth developed a crust that was probably made mostly of rock that were similar in composition to basaltic lava.
(At this stage in its history, Earth probably looked very much like the planet in Star Wars: Revenge of the Sith where Obiwan and Darth Vader had their climactic battle.) As this crust and the underlying mantle cooled we eventually say the formation of the lithosphere. (This is a layer of the Earth that contains all of the crust and about the upper 100 km of the mantle.) As this layer cooled it got denser. ... more.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.