20th century was composed of series of brutality, vandalism and serious violation toward humanity. Number of people were massacred, many relics were destroyed. We experienced how brutal mankind can be. That's main reason of birth of UNESCO.=That's  the main reason of the birth of UNESCO.
For more than half century, they established so much. They saved lots of relics from wars and develpments, children from poverty and ignorance. And it's still on-going project. Their role aren't restricted to preserving material things.=Their role doesn't restrict preserving material things They are well known for preserving immaterial cultural heritage world wide.
However, since so many sites had been desgnated as UNESCO heritage site, some place evokes disputes. =However, since so many sites had been designated as UNESCO heritage site, some places evoke disputes.Last year they recommended Hashima Island of Japan to be enlisted as a world heritage, which is notorious for slavery labour during Japanese imperilal age.=Last year they recommended Hashima Island of Japan to be enlisted as a world heritage, which is notorious for slavery labor during Japanese imperial age.  We can't expect every UNESCO site should be meaningful for every single people in the world, but we expect more prudence for them.