"Pascal (Wirth, 1970) was a high point in clean strongly-typed language design. Here, we see: every program has a name and, if it interacts with the outside world, must explicitly declare input & output."
"Except for a historical accident - and "accident" is the right word here - the Pascal language family would have defined mainstream programming instead of C/C++. The world of computing would have been much simpler and safer if that had occurred."
For added context ZZT was written by Tim Sweeney as an attempt to write a better Pascal editor. It turned into a game, later he incorporated things he learned from ZZT into Unreal.