Thoughts on the “March for Our Lives”

Many individuals with deep pockets and resources contributed to the “March for Our Lives” event. What does the cast of characters say about who was behind this event and its goals going forward?
Is there any possibility that this was an organic, grass roots, student-led event, as it was promoted and perceived?
What will be the long-term effect of this event–on Congress? On the country? On the church?