Full Idea
The start of philosophy is perception of the mutual conflict among people, and a search for its cause, plus the rejection and distrust of mere opinion, an investigation to see if opinion is right, and the discovery of some canon, like scales for weighing.
Gist of Idea
Philosophy investigates the causes of disagreements, and seeks a standard for settling them
Source
Epictetus (The Discourses [c.56], 2.11.13)
Book Reference
'The Stoics Reader', ed/tr. Inwood,B/Gerson,L.P. [Hackett 2008], p.202
A Reaction
So the number one aim of philosophy is epistemological, to find the criterion for true opinion. But it starts in real life, and would cease to trade if people would just agree. I think we should set the bar higher than that.