Conversation so far:
why is mit not an ivy league school
MIT is not an Ivy League schools simply because it is not a member of the Ivy League.
Who are the member schools of the Ivy League?
The Ivy League's eight members are Brown University, Columbia University, Cornell University, Dartmouth College, Harvard University, the University of Pennsylvania, Princeton University, and Yale University.

Question: When was the formation of the league?
Self-contained rewrite: When was the Ivy League formed?