One of the main reasons why foreign investment in Persia increased in the early 1900s was because the world became more dependent on oil and other fossil fuels--due to Industrialization--many of which existed in this Middle Eastern region.
Because economy within a certain region will be heavily depended on what resources that are available in that region.
Since the Arabian Pennisula do not possess a good climate to produce agricultural products, it's almost impossible for agricultural sector to flourish in this region, and therefore they focused their economy on things such as oil, silk, zaitun, etc.
To share what his family been through