Asia is the world's largest continent, home to 3/5 of the global population and extremely diverse cultures. It is also the center of many major world religions. Countries in Asia vary greatly in their levels of development, with Japan having a stable democracy and large economy, while Bangladesh has struggled with political instability. The Middle East is geographically ambiguous but includes culturally Arab, Persian, and mixed ethnic regions. It was the site of early civilizations and once hosted a large Islamic empire, though many countries are now authoritarian and dependent on natural resources. Misconceptions exist about the uniformity of the region.