system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why charities with similar goals don't merge to become more effective?

I saw today on my Facebook newsfeed of a video for I already forgot the name but a charity that provides clean drinking water to poor villages in Africa. 

I am all for the cause because everyone in the world should have clean water at a bare minimum. That said, I know I have seen at least 2 other charities with the same goal.

Why do these charities not merge, combine funds and resources, and provide more marketing campaigns and build more wells?

The only thing that comes to mind is el hefe of each charity wants his final say in how things are done and/or some want to push their agenda (be it a political/religious/etc affiliation). Please tell me it is not that ignorant? There has to be more reasons, right?
gpt
Merging companies (and yes, non-profits are companies) requires a lot of work. First, just because two companies do the same thing does not mean that they could merge easily. What if one is a Catholic charity, and the other is non-religious? Is the new charity religious or not? Which of the two Presidents is going to be in charge? Are you going to fire a bunch of staff? If not, how is it more efficient to have 1 big company with twice as many workers?

Companies merge when it makes some financial sense. Since non-profits are not in it to maximize value, they don't have to worry about being the biggest and best.