Blessings and curses

Does history reflect this Divine principle?

The first person in the Bible who was going to be a blessing to mankind was Abraham: “I will make you into a great nation, and I will bless you; I will make your name great, and you will be a blessing.” (Genesis 12:2) All people on earth were going to be blessed through Abraham, a spiritual blessing through his seed, Jesus Christ, who came around 2,000 years later. But Jesus was not the only seed of Abraham. The whole Jewish nation (including Jesus), which sprung from the descendants of Abraham’s second son, Isaac, also carry a blessing to the world.