Blockchain Demo [video]
At about 8:50 he describes how changes to early blocks cause the chain to &quot;resist change&quot;.  I understand how a change to a previous block will require re-computation of subsequent blocks, but how is this &quot;resisting change&quot;?  Just recompute the nonce for each of the remaining 2 or 3 blocks.  No big deal.  What am I missing?