Rembrandt "Jeremiah Mourning Over Future Interests"
The Doctrine of Destructibility of Contingent Remainders:"A contingent remainder must vest on or before the termination of the preceding estate; if it does not, it is destroyed."
The Doctrine of Merger is a principle of the common law that provides that whenever two consecutive vested estates in land are owned by the same person the smaller of the two estates will be absorbed by the larger.
When a large company buys out a small company and decides to merge with it (imagine Microsoft buying out Mom & Pop's little software company) usually what happens is the large company swallows the small company and the small company ceases to exist as a separate corporation but instead becomes a division or a department or a line of the large company. So Microsoft swallows Mom & Pop and comes out a slightly larger Microsoft.
Example #1: Grutz, the owner of Blackacre in Fee Simple Absolute, conveys it “to Doctor Butcher for Life, and if Cornelius Husker graduates from law school, then to Cornelius Husker and his heirs.”
What is the state of the title?
What happens if Cornelius Husker is admitted to law school, and in April of his 3L year, Doctor Butcher dies?
How about this one [#2]: Grutz conveys Blackacre "to Paul McCartney for life, then to the heirs of Jelly Roll."
What is the state of the title?
Suppose McCartney dies and Jelly Roll is still alive?
Now this one #3: Grutz conveys "to Doctor Butcher for his life."
What is the state of the title?
Now suppose subsequently Grutz conveys his reversion to Butcher?
What is the state of the title now? [Butcher owns both his life estate plus the reversion following his life state, thus....]
#4: Suppose Grutz conveys Blackacre "to B for life, then to C and his heirs."
Then C conveys his vested remainder to B.
What is the state of the title?
#5 Now suppose Grutz conveys "to Dr. Butcher for life, and if Cornelius Husker graduates from law school, then to Husker and his heirs."
Then suppose Grutz conveys his Reversion to Dr. Butcher.
What result?
Notice there is an exception to the doctrine of destructibility of contingent remainders: As Moynihan puts it: "a contingent remainder will not be destroyed by a merger of a life estate and the next vested estate when the two estates are created simultaneously with the contingent remainder." Example: "Therefore, if A conveys to B for life, then to C for life if C marries, then to B and his heirs, C's contingent remainder is initially valid." The reason for the exception, according to Prof. Moynihan, is that "if it were held that the merger of the two estates destroyed the contingent remainder created simultaneously with them, the intention of the transferor would be completely defeated."
However, suppose in the example that B transfers both his life estate and his vested remainder to Duncan. Now, Duncan's life estate will merge with his vested remainder in fee and C's contingent remainder will be destroyed.



