In a near-future an underground group of a very talented scientists was born. Since our world was on a brink of total collapse due to climate changes, resource shortages, general stupidity of world leaders and religious fanaticism, they considered this to be a now-or-never time for their "Project Equality" as a mean to erradicate a root of all these problems - inequality between people.
A very complex virus-bomb was made and spread all over the world's population. At set time this virus started to alter humanity into what someone might consider a completely different species. This species (lets call it E-Human) was similar to humans, however, it was mono-gender and didn't have any major racial features (like distinct skin color or eye shape). The change happened rather quickly (in a single month) and as it was found out, a representative of an underground group of scientists issued a statement at the UN: this transformation is not permanent, and everyone will be back to normal in 10 years. However, people have to learn this lesson.
So, what would world shape into after 10 years?
A few more details:
all people was transformed simultaneously.
there was no unaffected people.
there is no way to reverse transformation before the end of experiment.
any E-Human (whenever it was male or female before transformation) can bear a child, but conception still requires a partner. Pregnancy still lasts 9 month.
all children born in this 10-year timeframe would be born as E-Human, but will change to normal Human at the end.