Benjamin Schneer and Maxwell Palmer in TIME:

Instead, we believe it is possible to make reforms that keep the current electoral system while also overcoming some of its flaws. We’ve developed a process-based solution that has a number of appealing properties. It’s inspired by the problem parents face when dividing a cake between two children. How can they make sure everyone gets an equal slice? One child cuts the cake in two, and the other child chooses between the two pieces.

Our approach, which we call the “Define-Combine Procedure,” splits the map drawing process into two simple stages. First, one party divides the state into twice the number of needed districts—for example, 20 sub-districts for a state that needs 10 congressional seats. Then, the second party pairs those sub-districts into the final 10 districts. The result is a fairer map than either party would have drawn on its own. Instead of mutually assured gerrymandering, this approach leads to mutually assured representation.