The main cause was the assassination of Franz Ferdinand who was the archduke of Austria. He was assassinated by Gavriollo Princip who was Austrian - Hungarian. Those two countries were constantly in conflict because Hungary wanted to separate and once those countries went into war over the assassination their allies had to join being the rest of Europe. <span />
Answer:
Most countries are working to improve their HDI to match their IHDI.
Explanation: A country's IHDI should be worked on to match it stated HDI not the reverse.
