The term 'unemotional sort' can be summed up by the word 'STOIC'. The term 'STOIC' is derived from the ancient Greek school of philosophy known as Stoicism, which was founded by Zeno of Citium in the early 3rd century BC. Stoicism is a philosophy that emphasizes the development of self-control and fortitude as a means of overcoming destructive emotions. It teaches that one should accept life's hardships without complaint and remain indifferent to pleasure or pain. In modern usage, the term 'STOIC' is often used to describe someone who is emotionally detached and unresponsive to external events.