How long after Adam was created was the Law given at Mount Sinai?
The timeline presented shows that the Law was given at Mount Sinai 2,500 years after Adam was created. Mankind went without a written Law for those 2,500 years, about 2,000 years to Abraham and another 500 years to Moses.
Les teaches that from Adam until Moses received the Law at Mount Sinai, 2,500 years of human history had transpired. He breaks it down as 2,000 years up to Abraham and another 500 years from Abraham to the actual giving of the Law, noting that the 430 years is in round figures 500 years. During those 2,500 years, there was no written Law, no system of worship, no organized religion, and no written 'Thou shalt' and 'Thou shalt not.' The Law was added 2,500 years after the human race began because of transgressions, sin. Les illustrates how sin ran rampant by pointing to Genesis 6:5, where every imagination of man's heart was only evil continually.