Unity is usually conformity, not strength. From Paul Rosenberg at freemansperspective.com:
We’ve all heard the slogan, “United we stand, divided we fall” hundreds of times. It is portrayed as wisdom, but if fact it’s generally false. If you require a mass of bodies to charge another mass of bodies on a battlefield, unity matters. But when you want honesty, intelligence, compassion, innovation and evolution, unity is your enemy.
Unity works for body-power, but it works against all the higher and better aspects of our nature. That’s why the sacrifice collectors preach unity: they want obedient bodies, not self-determinant minds.
The really pernicious thing about unity is that it’s sold as some kind of spiritual ideal: We each sacrifice our ourselves, then we somehow become collective superheroes.
This also is false. The high and good – the truly spiritual – forms only in individuals. The more united our minds are, the more we decline. The more individual our minds, the more we rise.