A decade is too big of a window. It's tough to pick one decade over another but I do think I could pick one year out of every decade over the others. To put my thought another way, if you think of society as a system, you've got a short period where the rules are being changed, and then we let the system run its course for multiple years. Eventually there are some gross inefficiencies that become too big to ignore and we have another short period where the rules are changed again, and so on.