Which is the strongest thesis for an essay about volunteering?

In order for people to feel better about themselves, they really should spend more time volunteering in their communities.
Volunteering in the community is beneficial because it creates friendships, boosts self-esteem, and fosters physical health.
Volunteering can be an important part of feeling good about oneself and the community.
Before volunteering, people should think about the types of volunteer work they want to do.

Question

Which is the strongest thesis for an essay about volunteering?

In order for people to feel better about themselves, they really should spend more time volunteering in their communities.
Volunteering in the community is beneficial because it creates friendships, boosts self-esteem, and fosters physical health.
Volunteering can be an important part of feeling good about oneself and the community.
Before volunteering, people should think about the types of volunteer work they want to do.

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