unity vs a unity

Some examples from the web:

• Your message of unity has touched our souls.
• Germany has rediscovered its territorial and political unity.
• Our unity triggers the final transformation.
• Their momentary unity was only a chimerical illusion.
• Ecumenism is the search for unity between Christians.
• The diversity of viewpoints should enrich catholicity without harming unity.
• Meditation is unity, even as exercise.
• To feel our uniqueness and unity.
• Europe is lacking unity, authoritativeness and transparency.
• Our unity gave us the credibility to encourage others.
• Another property of Theology is its fundamental unity.
• Animator of unity with and among autochtonous priests and missionaries.
• Promote unity and reconciliation among our people.
• The deteriorating governance situation has compelled us to enhance donor unity.
• Europe has demonstrated its unity and solidarity.
• All creation has its harmonious unity in Him.
• Prayer strengthens the unity of all the family members.
• Nothing else can adequately explain our marvellous unity.
• From division comes unity, and from unity, division.
• Catholicity means universality - a multiplicity that becomes unity; a unity that nevertheless remains multiplicity.

Some examples from the web:

• But such measures can only work successfully if there is a unity of purpose amongst Member States.
• Doing that, together, as a team, created a unity within that prison.
• - And if there's a unity that makes them all me, I don't know what it is.
• welcoming the fact that cohesion and regional policy are being treated as a unity,
• Mr President, I will be no exception in this debate in congratulating our rapporteur on this ambitious report, and I welcome also the Commission's ideas tonight, which, I believe, demonstrate a unity of purpose between our two institutions.
• He won't expose Defiance if we run together on a unity ticket.
• President Grant's very interested in this idea of a unity ticket.
• And not a unity which discourages dissent.
• However, this solid mandate also shows that we have a unity there.
• The Union is a unity based on values.
• Now we have clarity and a unity of vision.
• Any alleged proof of such activities would need verification before any further steps toward a unity ticket could be taken, of course.
• Goebbels organized huge rallies whose function he said was to forge the mind of the nation into a unity of thinking, feeling and desire.
• But there's a unity of some sort that's starting to emerge.
• Without a unity government for the Palestinians, the peace process is unmanageable.
• Remember that one terrible word which will surely destroy Greece unless we counter it with a unity of our own.
• In one of our reports we recommend amalgamation of the three communities into a unity for reasons of greater clarity.
• I welcome efforts from Hamas and Fatah to form a unity government in an effort to end the international embargo on Palestine.
• I cannot announce a unity concert in front of a picture of a bald eagle giving the middle finger.
• Doing that, together, as a team, created a unity within that prison.