Wars do not contribute to progress. to prove it:

At first, wars destroy buildings, statues and libraries. For example, the great Gothic cathedrals and buildings were destroyed in the 2nd World War. The government buildings in York (now Toronto), the then capital of Upper Canada were also burned down by the Americans in April, 1813. The Burning of Washington in 1814 was an incident during the War of 1812. During World War II, Japanese military forces destroyed or partly destroyed numerous Chinese libraries, including libraries at the National University of Tsing Hua, Peking (lost 200,000 of 350,000 books), the University Nan-k'ai, T'ien-chin (totally destroyed, 224,000 books lost), Institute of Technology of He-pei, T'ien-chin (completely destroyed), Medical College of He-pei, Pao-ting (completely destroyed), Agricultural College of He-pei, Pao-ting (completely destroyed), University Ta Hsia, Shanghai (completely destroyed), University Kuang Hua, Shanghai (completely destroyed), National University of Hunan (completely destroyed). All these arguments shows that a lot of buildings, statues and libraries were destroyed because of wars. As a result, books were burned, cultures were damaged. So, how wars can contribute progress, if all achievements and knowledge, that were reached during many years, are destroyed in one day.

Secondly, wars do not contribute progress, because it carry death of thousand people. Statistics shows that, during the World War II, over 60 million people were killed, which was over 2.5% of the world population. Many people died because of diseases, poverty and starvation. That means there could not be any progress in such situations. Wars carry only destroying and death.