What would Earth be like without plate tectonics?

It really is impossible to say how the Earth would be impacted if the heat from the interior of the planet that powers plate tectonics were to suddenly cease to exist, or if that heat never existed in the first place, because that is how planets are formed. But for the sake of argument, let's say that the Earth cools sufficiently enough that the process of plate movement ceases Earth would have a much flatter topography as mountain creating plate collisions would not exist. Volcanoes over hot spots would create isolated hills, not mountains, and the effects of erosion would tend to flatten them out over time.

Because the Earth had cooled sufficiently for plate movement to cease, it would also probably mean that that the protective magnetosphere that is created by the movement of the liquid outer core would cease to exist, allowing the bulk of Earth's atmosphere to be stripped away by solar winds. All surface plants and animals and water would disappear One thing is certain, however, life would not be the same without plate tectonics. In one sense, the constant transgression/regression, due in large part to tectonic forces, acts as an evolutionary pump forcing life to evolve.

For example, the evolution of plants from marine to terrestrial settings. Without plate tectonics life would certainly be dramatically different, if not on a more speculative note, all together unlikely. The formation and breaking apart of super continents also strongly correlates with the largest mass extinctions throughout the geological record Note: This answer is solely based on good speculation (an educated guess).

You can still have igneous rocks being weathered and eroded to become sedimentary rocks without plate tectonics. For example, Venus has had volcanism yet, as far as we have observed, lacks plate tectonics (probably due to the lack of surface water as it is the weight of sediment build up in basins that allows the underlying plate to be subducted).

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.