 Yes, well in many ways you can differentiate between these different dimensions. Stamps have traditionally been seen as propaganda posters in sort of miniature memorials for the nation state, but I would argue as someone more interested in global history that stamps can also shed light on bigger processes. So for example on colonialism but also anti-colonial movements, the history of internationalism and sort of these values, and even a new global cultural heritage paradigm can be sort of traced via stamps, maybe to give an example. So in terms of sort of international movements, it's a bit hard to say, right, because stamps traditionally are issued by nation states, but if you take them as a sort of collective accumulated visual archive, you can see that also stamps project different visions of world order. So for example in the Cold War period stamps issued by countries within the Soviet sphere had a very particular socialist iconography, with peasants and factory workers and sort of tapping into the visual rhetoric of revolution. And when you think of other alliances that were sort of not, you know, sort of this bipolar called World War model, you can think of South-South internationalism. So following the Bandung Conference in the mid-1950s in Indonesia, African and Asian countries started to cooperate a lot and form an alternative sort of alliance to find their place on the world stage. And many of these countries that were part of what was later called the non-aligned movement issued stamps to commemorate conferences that they organized together, whether that was in Africa or in Asia, and to also celebrate some of the iconic figures that were central to the movement. For example, such as the Prime Minister, the first Prime Minister of India, Nehru. So maybe one aspect I could think of in sort of the on the cultural plane is that so UNESCO became a very important international organization and UNESCO basically allowed local cultural historical and natural sites to be transformed into world heritage sites. And these very sites, these monuments, whether it was architectural or more related to the natural world, they were celebrated on iconic postage stamps. And I think here you can also again see that stamps, if you see it as a collective earthquake and shed a light on broader trends in world history, if you will. And the UPU, the UPU's role has been one, I think, of standardization, of coordinating and streamlining this process and by bringing together different nation-states, different stakeholders, and as one of the oldest, if not I think the second oldest international organization in the world. It has, I think in many ways, been a beacon of an example of how nations can cooperate also on matters that could be very divisive and related to monetary issues, for example.