Life was certainly a lot harder before plastic was invented. And had the clever men and women who stand behind the development of plastic not worked so hard and had they not been so devoted, we wouldnÂ’t have such great applications for the different kinds of plastics today. The history of plastic spans over a period of more than 150 years and throughout those years there have been some tremendous discoveries, clever inventions and innovative developments in the field. Plastic has come a long way, so letÂ’s take a look at how it all began and the major milestones in its history.