Why had transportation made so few improvements?

Draw conclusions  why might a cause like italian unification successfully draw people of very different backgrounds together?  

Which of the following was an effect of allied defeats and high casualty rates on the eastern front? the united states issued the fourteen points. russia entered the war on the allied side. the united states entered the war sooner. russia experienced a revolution and dropped out of the war.

What was the main argument of plessy in plessy v. ferguson