The phrases “precursor to” and “precursor of” have the same or similar meanings. They are referring to something that happened previously before something else happened. However, many people are confused about when they should use which phrase. It would be best to analyze the words that are different in these phrases. “To” usually means to travel or move towards something, whereas “of” means to be apart of something.
There is generally more emphasis on certain words regarding the use of “precursor to” compared to the sentences that include “precursor of.” There is less of a relationship between when the phrase “precursor of” is used between the two words that are being compared or related. Many people often misuse the sentences, and then it is difficult to understand what they mean.