The Law was before Moses?

The Bible says that “the law was given through Moses” (John 1:17), yet God testifies concerning Abraham who preceded Moses by hundreds of years saying “Abraham obeyed my voice and kept my charge, my commandments, my statutes, and my laws” (Genesis 26:5). Though NT describes Abraham as “the man of faith.” (Galatians 3:9) it does not mean that he was “lawless.” The same can be said of Noah, even further back to Adam and Eve, Cain and Abel.