It looks like your sentence was cut off, but I'll try to provide some context and complete the thought based on common discussions around this topic.

Many people think it necessary for people to [do something] or many people think it necessary for people [to have certain qualities/skills]. Could you please provide more details so I can give a more accurate response?

For example:
- Many people think it necessary for people to get vaccinated.
- Many people think it necessary for people to learn multiple languages.
- Many people think it necessary for people to recycle.

If you could finish the sentence or provide more context, I'd be happy to help further!