The movie disintegrated way before that underwear scene! If you have watched the movie, here's a rib-tickling summary that you might enjoy.
Lately I have been reading books about how humans have been obsessed with genetic engineering since 12,000 BC, when plants and animals were domesticated through selective and deliberate breeding. Back then, we were preoccupied with converting wild rye to more domestic varieties, or grey wolves to dogs; Now, we have come as far as being able to accurately predict the whole genome of an unborn baby by sequencing the DNA from the mother’s blood and the father’s saliva; It won’t be much longer before we are able to manipulate our genetic makeup, and correct mutations which cause diseases.
When Star Trek was created in the mid-1960s, we had just come out of a very dark age that coincided with the two world wars; when scientists and politicians in several countries began targeting humans with ‘unfit’ traits, and forbidding them from marrying or procreating. The American Eugenics Society encouraged the creation of a superior human race through selective breeding. They organized public lectures, brought out publications, conducted “fitter family contests” among other things to educate people on the laws of inheritance. Here’s an example of a chart displayed at the 1929 Kansas Free Fair!
Many eugenics policies and programs, such as genetic screening, racial segregation, segregation of 'degenerate' and 'unfit' humans, compulsory sterilization, forced abortions and euthanasia were implemented in several countries, such as America, Brazil, Canada and several European countries (the reasons for and the methods of implementation were different in each country).
32 States in the US had eugenics programs. In North Carolina alone, more than 7600 men, women and children were sterilized, oftentimes against their will, even for reasons such as being 'feebleminded', 'troubled' or 'poor'; and this went on till the mid-1970s! Part of the reason for the sterilization was that abortion was illegal, birth control was not easily available in some places, and giving birth to an unfit child was just not an option! It was not until 2002 that the Governor of North Carolina formerly apologised to the victims, repealed the involuntary sterilization law, and ruled out sterilization for reasons of 'hygiene' and 'convenience'. Even today, a proposal to compensate the victims ($50,000 per person) is being debated, and only a few hundred victims were willing to reveal themselves because of the continuing stigma of being sterilized. Victims in other countries too were reluctant to come forward for the same reason.
Star Trek exemplifies one train of thought on what might have happened if we had continued on that path of racial cleansing. It is a fictional account, but one that has tremendous significance, especially given what was happening in real life during the time the story was conceived. If you watch the TV series, you will realize that every episode touches on one or more contentious real-life issues of that time that are relevant even today; and gives you a lot to reflect on!
Now to put ourselves and the movie in the context of its timeline:
According to the Star Trek timeline, we are somewhere between the Eugenics War of the early 1990s and World War III of the 2050s; The movie takes place 300 years from the Eugenics war, by which times humans have put their savage past behind them and moved on.
Prior to the 1990s, human scientists had been working on improving their race through selective breeding and genetic engineering. In the process, they created superhumans called Augments, with superior physical and mental abilities. What was unanticipated was that the Augments would want to dominate the world. Khan, the most powerful of his kind, appointed himself "absolute ruler" and ruled a quarter of the Earth, and close to 40 countries. His reign was mostly admired, because he was a man of peace, and there were no wars or violence under him, that is, until the humans rose up against the Augments. A huge war broke out, nearly devastating Earth. Most of the Augments were killed, except Khan and 84 others who managed to escape Earth in a sleeper ship, where they remained cryogenically frozen for three hundred years, until the crew of Enterprise discovered them in 2267. The current movie is set in this time period.
Soon after the Augments were deposed, not all was peaceful on Earth. By the 2050s, World War III broke out between various factions still in conflict on earth about genetic engineering, governments controlling military with narcotics and issues of ecoterrorism. All this led to World War III and the resulting nuclear exchange killed 37 million humans, leaving Earth mostly uninhabitable because of radioactivity, supply shortages, and the collapse of most of the major governments. Hundreds and thousands of humans were also mercilessly killed by evil troops to eliminate the spread of radiation sickness, impurities and mutations to future generations.
It took two generations of peace attempts for the post-atomic horror to give way to unified world alliances and end poverty and disease. During the 2060s, a team of engineers built Earth's first warp ship, which drew the attention of a Vulcan ship passing near Earth, who made their first contact with humans, and ushered us into a more peaceful era.
By the early 2100s, Earth was finally rid of poverty, disease, war and hunger. A United Earth Government was formed in 2150; A non-profit economy was developed, and replicators were used to satisfy material needs; although people were no longer obsessed with the accumulation of wealth or possessions. Humans were mostly focussed on enriching themselves in a secular, non-religious environment free of superstitions. A great deal of emphasis was placed on the importance of continued social and personal development, and the rest as we know is history!
Now… in the Reality meets Sci-fi spirit … here's a Spock talks to Spock Prime type video: