Series of characteristics of complex systems!

In the previous posts, I intented to make you familiar with the holy grail of my current research. In general, I mostly deal with three main issues: "Packaging logistics", "sustainable development", and "complexity".
In a series of coming posts, I am going to write about definitions, characteristics and themes of each issue; starting by complexity and complex systems. In addition, I will try to mention examples from several disciplines but mostely from logistics, packaging logistics, and sustainable development. The next post is about 'definition of complex systems'! So, do not forget to follow;