Do you know who was your great-grandmother? And where can you fill the gaps in this information? Thanks to the development of the Internet, more and more information about famous people accumulates in resources like Wikipedia. Of course, this does not mean at all that this is the most useful information we need. And again, what about great-grandmother? We need to stop being careless about our past, about the information accumulated by our ancestors. The information of humankind must stop to disappear.
If we take into account that civilizations arise and disappear periodically in the Universe, this is why we need to collect and save information accumulated by us, and send it in all directions, so that after our disappearance it can be used by other civilizations. As well as we need to look for similar clues left by them how to survive and develop more effectively.
Specific actions: Wikimemory