The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The things that are needed for human solidarity to thrive in a Catholic perspective are the understanding and the compassion of good Catholics to the pain and suffering of other people.
According to the Catholic religious teachings, Catholics must recognize the necessities of other people who are suffering and show the kind of compassion and respect for the events they are living, understanding that God has a purpose for every one of us.
The reasons of the almighty God can be unknown to humans, but he has his motives. Or as the common saying states, "God acts in strange ways."
Catholics are taught that humans form a big community on Earth, and they can help and be part of the solution trying to understand the circumstances of other people, walk in their shows for a while to understand what they are living, to never judge, and lend a helping hand when it is needed.