We are now learning Genesis 25:19–28:9, called “Toldot” meaning generations or offspring. The focus is on Isaac’s life, and his twin sons Jacob and Esav. Last year we discussed how Esav was seemingly the natural leader, the alpha of the two. However, Jacob, described as simple and involved in scholarship, was actually meant to be the heir to the spiritual mission. Jacob, with Rebekah’s help, steps in to receive the first blessing from his father, usurping Esav’s position as firstborn. We see that Jacob was not as simple as he had seemed.
Isaac himself is more complex than a cursory reading of the Bible indicates. As the middle of the three Patriarchs, Isaac is a transitional figure between Abraham’s innovation of monotheism and Jacob’s fathering the twelve tribes of Israel, the beginning of the Jewish family becoming a nation. In Isaac’s day, Judaism and monotheism is still limited to just one family. Isaac was the man who had to consolidate monotheism and nurture his sons into continuing the mission.
Of the three Patriarchs, Isaac gets the least press in the Bible. Most of what we know about Isaac, after his marriage to Rebecca, is in this weeks’ reading. We see that Isaac’s life echoes Abraham’s own, but with certain crucial differences. In Genesis 26 we see Isaac move to Gerar in response to a famine, as Abraham did in chapter 20. The current king of Gerar, also named Avimelech, takes an interest in Isaac’s wife, but does not abduct her as the prior king had taken Sarah.
Avimelech actually sees Isaac flirting with or seducing Rebecca 26:8, which clues him in to her actual status as his wife. Isaac explains that he was in potential danger over being murdered to steal his wife, much like Abraham had in the prior generation, and conflict is averted.
However, Isaac did not need to go through the ordeal of having his wife taken away and needing to stay silent to save his life. Likewise Rebecca was saved from being taken into the harem of an idolater. This could be because the locals had been punished for taking Sarah, or because Isaac and Rivkah were more open with their affection (though some explain that Avimelech used divination to see into their home).
Isaac also digs out the wells that Abraham had dug, which had been filled in by the Philistines 26:15. Isaac even gives them the same names 26:18, but the locals fight over ownership of the water. We did not see this in Abraham, who was recognized as a war hero after taking on the four kings.
Isaac is trying to follow in Abraham’s footsteps, but meeting resistance. This could be because Isaac seems to be a more private figure. While he was engaged in the economy and had many servants, he does not engage in the political world to the extent Abraham did. Isaac ends up having to dig new wells for himself, creating Be’er Sheva, which is still a modern city in Israel.

The monogamist patriarch
Isaac is the odd patriarch out in terms of his family as well. Abraham had a wife and at least one concubine, and multiple sons over the course of multiple decades. Jacob had two sister wives and two concubines, and sires 12 sons over a period of about 14 years. Isaac only ever has Rebecca. His only children are the twin boys Jacov and Esav. Isaac is the obvious exception among our patriarchs.
Our sages bring an ancient tradition that on his way out of the womb, Esav did damage to Rebekah’s uterus in an attempt to kill his twin. Esav was described as well developed, born with hair. That would explain why Isaac never has other children, since we do see Isaac continued to be intimate with Rebekah years later (26:8).
So why didn’t Isaac take another wife or concubine to father more children and spread monotheism? We could suggest that taking multiple women was a sign of wealth, the conspicuous consumption of ancient times. A man had to be rich to provide for multiple women, so a rich man would have many to show his wealth.
However, Isaac was also very rich (26:12-16). By contrast, Jacob had nothing when he married, in place of dowry he was required to work for seven years for each wife (29:18). There was actually a great reason Jacob volunteered to work the first seven years, as we explored.

I propose that Isaac and Rebecca were purposefully monogamous and content with their twin boys. Isaac himself is aware that it is possible for one man to marry multiple women, he grew up with not only his father and mother but Hagar and Ishmael. This caused considerable friction in the family, when Sarah, seeing Ishmael threaten young Isaac, demands Ishmael be expelled.
Perhaps living in a mixed family, with potential mortal danger from his half brother, turned Isaac away from the option of taking a concubine. A person’s childhood experience has profound effects on their adult choices. Yes, we have free will, but it is always in context.
Isaac knows that more than one woman may be destined for a single man, but he doesn’t feel that this is for him. It was not that Isaac had “one-itis” or an unhealthy obsession with his wife. He never put her on a pedestal and thought of her as his only option. We see that Isaac was very practical in seeing Rebekah in her feminine role before he married her and loved her. It appears that having seen his own mother have to deal with a co wife and having dealt with a threatening half brother, Isaac simply does not want that tension in his own family.
We can speculate that his childhood nudged Isaac against creating such a situation for himself and his family. However, Isaac came to terms with polygyny, the Biblically approved form of polygamy. We learned last week that Isaac himself brought Hagar back to Abraham, so Abraham could marry her again after Sarah’s death. Isaac does not seem bothered by this act. He knows his father had more than one woman and accepts this.
I suspect that Isaac saw in his twin sons all the potential that was needed for the future Jewish nation. Esav was strong, aggressive, a hunter and a natural leader. He, through his offspring, would handle the political and economic aspects of the Jewish nation. Jacob was a profound scholar, who dwelled in the tent of learning. He would nurture the spiritual life of the Jews. Isaac felt that he had already produced the progenitors of the Jewish people. He didn’t need to produce more offspring.
As we discussed last year, due to Esav’s corruption it turned out that Isaac was wrong about him. Instead of both sons forming the nucleus of the Jewish nation, Jacob alone was the true heir. Jacob’s challenge was to step up and succeed in the political and economic areas of life, not just the spiritual.
Isaac’s assumption was that his children were already the proto tribes of Israel. However, this would actually come through the next generation, through Jacob and his four wives. There are profound reasons why the 12 tribes had to come through four different women, as we will begin to see next week.
Generation skipping
We see among our Patriarchs that not just polygyny skipped a generation, but involvement in political affairs and travel outside Israel. Both Abraham and Jacob spent considerable time outside of Israel, much of it learning to deal with hostile men and protect the monotheistic mission from corruption. Abraham was engaged in publicly preaching monotheism, and had to go to war to save his nephew Lot. He returned a hero and regularly dealt with kings and holy men.
Jacob escapes his brother to live abroad with a cruel and manipulative uncle, then escapes the uncle only to be faced with his brother at the head of an army. Finally he travels to Egypt to reunite the family. Isaac never leaves Israel, God Himself commands this 26:2. Isaac is more reserved, less public. He only seems to deal with outside people when they come to him, as Avimelech does twice.
This illustrates a general trend in human history. Societies, nations and men tend to go to an extreme and then return to the middle, then the pendulum swings again. Cultural forces are never stagnant, men are always in motion, creating and nurturing new ideas and approaches to life. If Isaac had engaged in seeking concubines and children it would have degraded his ability to teach his twin sons. In the next generation Jacob, we shall see, originally intended only to marry Rachel. The situation demanded that he father sons with four different women, to create the 12 tribes of Israel.

We can safely say that the only constant is change. Men need to adapt to the environment and the respond to the social pressures placed on them, and overcome obstacles. You have to be aware that the approach that will allow you to succeed is not the same path that your father or grandfather took. While we must look to our ancestors and patriarchs for guidance, modern men need to know that we have to innovate for ourselves while we respect our ancient traditions.