In our case it was knowledgeable representatives of the citizenry who drafted the laws. Changing those laws would require far more than a simple 50.1 majority vote.
The definition of democracy has never changed, it always has been rule by the majority. That has always been understood to be both bad and good though, and that depends both on how involved the citizenry are in the process, how knowledgeable the citizenry are on what they are voting on, and on whether there are limits to what can be changed by a simple vote.
Unchecked democracy though is like a fire run rampant, it consumes and eventually burns out.