What kind of past does the present need? On the history that unites Poles and Ukrainians

The discussion of two intellectuals involved in the Polish-Ukrainian dialogue aims to answer two questions that concern Ukrainian society:
- What aspects of the past of Poles and Ukrainians unite or can unite both countries?
- How to make the interpretation of the past not a source of emotions and resentment, but rather a factor that contributes to better mutual understanding between Poles and Ukrainians?