Linear time
As human beings we have developed through the millennia a rich and amazing diversity of “mind things”, things that only seem to exist in our inner mental world. Most of those things seep out into the “real” world more or less. The concept of linear time for example may very well have been developed only about ten thousand years ago (“only”, because as human beings we have a track record on our planet I like to start one million years ago, which is one hundred times longer)1 . This mental concept may have come into existence in a certain period, possibly that of the first dynasties of Egypt, but it is very likely that it did not originate at a certain time or place, but that it came to be more or less synchronous at different locations in the same period. This can be inferred from similar events that cannot really be attributed to a certain “inventor” or originator, but that seem to have been “in the air”.


