If you dig deeper you'll also find that interior design history goes back longer than just the sixties or the seventies. It spans centuries and it spans continents, and it is admittedly one of the more fascinating aspects of human life. You can tell a lot about a culture by the interior designs for that particular time, and you can tell a lot about the people by how they have gone about designing their homes.
No two people are alike and this is also reflected in the way they furnish their homes. Interior design history through the ages has shown us that two people living in the same era and even next door to each other might not always display the same outlook of society that a general broader view might give you.
For instance you might like to have more of an elegant and traditional look and feel to your home whereas your neighbor might prefer the well-lived in look and shun the elegance you so desire. Taken separately what you get is a cross cut of one part of the social outlook for that age. And an interior design history student of the future might be forgiven for jumping to the conclusion that society during our time was either obsessed with perfection, or conversely that society had deteriorated to such an extent that homes were kept looking like pig-sties!
The interpretation of what they come across is entirely up to their discretion and what society is like at that period of time as well. So we as the interior design history students will also place different connotations on what we perceive as the reasons for a particular look in a particular era. But there's no doubting that no matter what conclusions we come to there's nothing more fascinating to look at than our interior design history.
There is just one thing to beware of in looking at the interior design history. And that is not to decide that interior designs from that or any other period of time did not have originality and initiative.