Why We Dream??

               In the third third Millennium BCE, Mesopotamian Kings recorded and interpreted their Dreams on wax tablets.
              A thousand years later,
Ancient egyptians wrote a dream book listening over a thousand common dreams and their meanings.
             And in the year since,  you haven't paused in our quest to understand why we dream.  So,  after a great deal of scientific research, technological advancement, we still don't have don't have any definite answer,  but we have have some interesting theories.

             (1.) We dream to fulfill our wishes.
In the early 1900s,  Sigmund Freud proposed that while all of our dreams l,  including our nightmare,  are a collection of images from our daily conscious lives,  they also have symbolic meanings, which relate to the fulfilment of our subconscious wishes.  Freud theorized that everything we remember when we wake up from a dream is a symbolic representation of our unconscious primitive tho, urges,  and desires.  Freud believed that by analyzing those remembered elements, the unconscious content would be revealed to our conscious mind,  and psychological issues stemming from its repression could be addressed and resolved.

                (2.) We dream to remember.  To increase the performance on certain mental tasks, sleep is good, but dreaming while sleeping is better. We dream to forget There are about 10, 000 trillion neural connections within the architecture of our brain.  They are created by everything you think and everything you do.  A 1983 neurological theory of dreaming called reverse learning,  holds that while sleeping and mainly during REM sleep cycles,  your neocortex review these neural connections and dumps the unnecessary ones. Without the this unlearning process,  which results in your dreams, your brain could be overrun by useless connections and parasitic thoughts could distrupt the necessary thinking you need to do do need to do while you are are awake.

            (3.)  We dream to keep our brains working.  The continual activation theory proposes that your dreams result from your brains need to to constantly consolidate and create long term memorize memorize in order to function properly.  So when external input Falls below certain level,  like when you are are you are are asleep,  your brain automatically triggers the generation of data from its memory storages,  which appear to you in the form of the thoughts and feelings you you experience in your dreams.
           In other words,  your dreams might be a random screen saver,  your brain turns on so it doesn't completely shut down.

          (4.) We dream to rehearse.
Dreams  involving dangerous and threatening situations are very common, and the primitive instinct rehearsal theory holds holds that the content of a dream is significant is significant significant to its purpose.  Whether it's an anxiety filled night of being chased through the woods by a bear or fighting off a ninja in a dark alley,  these dreams allow you to practice your fight or flight instincts and keep them sharp and dependable in case you will need them in real life.  But it doesn't have to be unpleasant. For instance,  dreams about your attractive neighbour could actually give your reproduction instinct some practice, too.

             (5.)  We dream to heal.
Stress neurotransmitters in the brain are much less active during the RER stage of sleep,  even during dreams of traumatic experience, leading some researchers  to theorize that one purpose of dreaming is to take the edge off painful experiences to allow for for psychological healing.  Reviewing traumatic events in your dreams with less mental stress may grant you a clear prospective and enhanced ability to process them in psychological healthy ways.  People with certain mood disorders and PSTD often have difficulty sleeping,  leading some scientists to believe that that lack of dreaming may be a contributing factor to their illnesses.
           (6.) We dream to solve problems.
Unconstrained by reality and the rules conventional logic, in your dreams, your mind can create limitless scenarios to help your grasp problems and formulate solutions that you may not consider while awake. 
     
     And those are just a few of the more prominent theories.  As technology increases our capability for understanding the brain,  it's possible that one day we will discover the definitive reason for them.  But until that time arrives,  we'll just have to keep on dreaming.