How did the human race begin to split into three races?
After the flood, with Noah and his three sons—Ham, Shem, and Japheth—the human race began to split into three races. The lines descending from Ham, Shem, and Japheth formed the three racial divisions. This division is traced through Noah's three sons after the flood.
Les explains that from Adam until Abraham, God dealt with one race of people. There was no organized system of worship, no temple, and no written law; it was based on man's conscience and a blood sacrifice by faith. After the flood, with Noah and his three sons—Ham, Shem, and Japheth—the human race began to split into three races: those coming from Ham, those from Shem, and those from Japheth. Les notes his own slip of saying Moses instead of Noah when introducing this division.