"Now to Abraham and his seed were the promises made..." (Galatians 3:16a).  The lives of certain saints recorded in ancient Scriptures have been key to God's plan for all His people.  Three generations of these fathers (or patriarchs) are written of in Genesis -  Abraham, Isaac, and Jacob.  Jacob, whose name was changed to Israel by God, had twelve sons who were the fathers of the twelve tribes of the Israeli nation.  Most of the Old Testament is about that people.  It is  also the Scripture given as a preparation for the coming of the Jewish Messiah, God's promised Saviour.

God selected the Patriarch Abraham with this plan of a Saviour and Salvation from sin in mind and made certain promises to him and to his seed.  "And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed" (Genesis 12:3).  The fullest and most comprehensive sense in which we are to understand the word "seed" is the Messiah, the Christ that God planned to send into the world to provide salvation by dying for our sins.  The remainder of the verse quoted at the beginning tells us, "He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ" (Galatians 3:16b).  Hebrews 1:2 tells us that He is the heir of all things.
God's promise to Abraham lays the foundation for the Good News of salvation through Jesus Christ, and the eternal blessings of forgiveness and everlasting life depend entirely on our relationship to Him.  We receive the blessings of Abrahamic promise through faith in Christ alone.  "For all the promises of God in him are yea, and in him Amen" (II Corinthians 1:20a).  Those who believe in Jesus Christ are also spoken of  as the seed of Abraham.  "And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise" (Galatians 3:29).
There is also a sense in which the Bible speaks of Israel as Abraham's seed. God yet has a plan for that nation through the Messiah, as spoken of in Bible prophecy.  The promise of God to bless them that bless Abraham's seed has been proved in history by the smile of providence upon the nations that sympathize with Israel despite the prevalence of world antisemitism.
"For nation shall rise against nation, and kingdom against kingdom: and there shall be famines, and pestilences, and earthquakes, in divers places" (Matthew 24:7).

Some are offended that anyone should see a connection between a global increase in horrific disasters and Bible prophecies that speak of a global increase in horrific disasters.  While it may be true that Bible truth is abused by some religious scam artists for personal profit, it should not prevent sober minded persons from inquiring into its real significance.

First, events today are a reflection of where the world is at morally and spiritually.  Sin is shown in Scripture to be a weight on planet earth that it cannot bear.  The first disobedience by our father Adam changed our home from a perfect paradise to a world of thorns, thistles, suffering, and death.

Israel too learned that sin turned their Land of Promise into a land of misery and terror.  They learned the sinfulness of sin by experiencing invasions, famines, plagues, and other curses upon their homeland.
Second, we are being given today an orientation in God's prophetic program.  Prophecy teaches us that as we see the things of the last days begin to take shape around us we should expect the soon arrival of the finale.  The cymbals of God's displeasure will soon rise to crescendo.  We are taught to understand the scattered disasters of the end of this age as a foretaste of a rapidly approaching time of terrible global troubling.  This is God's flashing YOU ARE HERE sign.
The  Lord Jesus fulfilled many prophecies when He was born of a virgin and went on ultimately to die as a sacrifice for our sins.  He also literally fulfilled prophecies by His resurrection and ascension to heaven, where He remains in glory to this day.
The centre of remaining prophecy is about His return to establish a glorious kingdom on this planet.  In between those comings is the present age of opportunity to respond to the offer of salvation and share in His glory.  Before that, comes the time of troubling that will be God's answer to a rebellious world in rejection of His chosen King.  The "new world order" being erected all around us today is a substitute for God's plan which denies Jesus Christ His place on the throne.  This is why God must shake the earth.