Final answer:
The new technologies of the Civil War like railroads, the electric telegraph, and advanced weapons made it a particularly destructive conflict, marking a true statement. These technologies increased the scale and lethality of the war, contributing to the concept of total war.
Step-by-step explanation:
The statement that the new technologies of the Civil War made it the most destructive war up to that time in history is true. Innovations such as railroads, steamboats, the electric telegraph, and advanced weaponry like high-explosive artillery shells and machine guns significantly altered how the war was fought. These advancements enabled quicker troop movements, more efficient communication, and led to warfare on an industrial scale, greatly increasing the war's lethality.
Moreover, the concept of total war emerged during the Civil War, which involved targeting both military assets and civilian resources, further contributing to the immense destruction. The market revolution, women's mobilization during wartime, and the later enactment of the First Reconstruction Act all underscore the tremendous social and economic changes the United States experienced during and after the Civil War.