The amazing effects of recent films like Downsizing and Ant Man &The Wasp, show how far Hollywood has come in making a convincing reality that is grounded in science fiction. Where the MCU Ant Man films have brought the idea of shrinking into modern pop culture and Downsizing gave us a new vantage point to view our culture and how mankind has mistreated the planet we call home, they were not the first films to deal with making people little.
Some of their predecessors were full on fantasy films, while others were the predictable mad scientist tale of power and control. There were even a few that were written and intended to be funny (and many that were unintentionally funny).
Here is a brief look at the history of shrinking in the cinema up through the 1950s.