"Legion" has some thoughts on the loss of individuality.
The democrats are making a big deal out of "standing together" indicating that we can all benefit if we all join hands and work in unison towards one common goal (as specified by the "progressives). In their case that "one goal" is one massive centralized government controlling every aspect of our lives. If our founders had believed that Marxist philosophy there would be no Declaration of Independence, no Constitution, no Bill of Rights, nor other founding documents, indeed no United States of America. Instead we would still be paying tribute to the British Empire.
Our creator didn't expect us to "group think". He gave us spiritual identity and an individuality to express that identity. Progressivism responds by eliminating religion.
Most progress throughout history has begun with a single idea by someone who was convinced there was a better way. Early seafaring explorers had to overcome the group thinkers who were convinced the Earth was flat, or there were giant sea monsters that would devour sailing vessels. Jonas Salk devoted much of his life believing he could find a cure for polio. The list of such examples is endless.
Conversely, Progressivism means only the state has the power and wisdom to determine which ideas are worth pursuing and by whom. They oppose independent thinking and imagination. They have been extremely successful accomplishing this goal in regards to education, media, entitlements and health care. The next big goal is the environment. Belief in climate change is a huge objective. Once all these goals are under state control they will control every aspect of our lives. That's called communism. Tried often but never worked.
How have these successes been achieved? By PC, where "group think" is rewarded and free speech, innovation and independent thought are forbidden and punished.