According to the article, this isn't the first time they've done this:
>The Pearsons are no strangers to lawsuits regarding their philanthropic contributions. In 2011, Thomas Pearson sued Garrett-Evangelical Theological Seminary, his father’s alma mater, alleging that a $1.2 million gift made in their name to the Methodist seminary had been misused. The United States District Court for the Northern District of Illinois ultimately ruled that the Seminary had respected the terms of the contract and dismissed all of the Pearsons’ claims.
My hunch is that they grossly overestimated what a political science department could do to "reduce conflict around the globe".