the relationship link between terrorism and organised crime

The aim of this assay is to discuss the relationship between terrorism and organised crime such as (drug dealing, Kidnapping, piracy and money laundering) in addition to explaining the extent and boundaries of this relationship through the definition, similarity and differences between the two (terrorism and organised crime), the cause of this link. Has this relationship lead to the growth of terrorism phenomena.
Note:I would like this essay to be critical more than descriptive with current examples as evidence.