In reply to Gary Clark.

Apologies to all,
Here is the common purpose, mission, and values which include purpose and common bond I referred to in my first response

Mission, Vision, Values
We call our mission, vision and values ...
The Thrivent Way
We are a membership organization of Christians,
and our members are our owners.
Our purpose is to serve our members and society by
guiding both to be wise with money and live generously.
We believe that all we have is a gift from God
and that generosity is an expression of faith.
We succeed when our members, their families
and their communities thrive.
We value our relationships, so we will:
Be trustworthy in character and competence, and
Act like owners and treat each other as owners, and
Live balanced and generous lives.

From

Financial Services
We're here to help you be wise with money. We offer a full complement of products, services and professional advice to help you meet your goals – wherever you are in life. Every step of the way, you'll partner with a caring, knowledgeable financial representative, who will offer guidance and advice to help you make informed financial decisions.

Member Focus
As the nation's largest fraternal benefit society, we're committed to helping others. We do this through national volunteer programs and grassroots initiatives. Our members meet in chapters and participate in various educational, social and volunteer activities. Together, our members connect with one another, strengthen their communities and congregations, and support individuals in need.

What's a Fraternal Benefit Society?
At the beginning of the 20th century, life insurance was a largely unfamiliar and unaffordable concept. Fraternal benefit societies were formed so people with a common bond – typically religious, ethnic or occupational – could help one another when tragedy struck.
Fraternal benefit societies also provided opportunities for people to socialize and helped recent immigrants acclimate to America. Members belonged to local "lodges" or meeting places where they could come together as a community and celebrate their common bond.

Official definitions of a fraternal benefit society:
• The IRS defines a fraternal benefit society as "one whose members have adopted the same or a very similar calling, avocation, or profession ... working in union to accomplish some worthy object." The IRS also notes that members of a fraternal band together as a society to "aid and assist one another and promote the common cause" and engage in activities of a "beneficial and fraternal character."
• The National Fraternal Congress of America (a trade group) defines it as a membership organization united around a unique common bond. And it must offer members fraternal benefits including insurance. The common bond of Thrivent Financial for Lutherans is Christianity.
To be exempt from income tax, a fraternal benefit society must also "operate under the lodge system," which means having its members belong to subordinate units that are "largely self-governing." In our case we call them chapters