Where did the specialty coffee plants come from originally?

Where did the specialty coffee plants come from originally?

Over the decades of harvesting and selecting the beans for the upcoming season (before GMO and laboratory modification of plants) the local growers noticed certain plants obtained special characteristics such as aroma, flavor, and growing characteristics. The growers consider that this was due to the hand of God using natural selection to create a one in a million modification that then is selected by the grower. This same process is responsible for other plants like corn and wheat which were cultured by ancient civilizations and selected over the centuries to bring the varieties that lead entire nations to success before man began modifying plants to be compatible with his chemical arsenal of herbicides and fertilizers.