The human - supposedly the most intelligent being - collectively puts himself in hopeless situations. People's activity can cause very undesirable results.
A human's brain is full of surprises. It is the most misterious thing that causes questions even for the most competent scientists. Even after a lot of research it is still impossible to explain why does a person do a certain thing.
We are biologically incomprehensible beings, that is because we always do what we want to. We like breaking rules, we like looking for danger, we are in a permanent search of new experiences, that is why we often choose to put ourselves in hopeless situations. That is our manner of testing our limits as well as our forces. Simultaneously, we want to feel the power, we want to make others worship or serve us. That is how people with influence convince others to do what they want to, or just make them want to do that. When people do something collectively, they usually follow the opinion of one of them. Listening to everybody's voice would cause a chaos. People need a leader in every field of activity, as long as they don't have leader abilities themselves. When people collectively put themselves in helpless situations they do that in order to obtain something for themselves as a team. An example here would be the way people protest for a better life in their country. They don't do that just because they want it, contrariwise they do it for the entire nation. I don't think that people acting in this way present any kind of danger, as long as they act wisely. On the other hand there are situations when people act distructively, following an incompetent leader. These situationd usually end up with undesirable results for the entire group as there were more people participating in these action.
In conclusion, a collective is always a strong power. When a single person puts himself in a certain impossible situation he is forced to find a solution alone, whereas groups have to end what they started as a group as well. When there appear any divergences, a team is more likely to fail, being unable to take a single decision from one hundred or more minds. That is how collective activities can cause undesirable results.
Literary property: hellenetk