人類のために働くつもりだ。の英語

I will labor in the cause of humanity.

I'll do anything in the interests of humanity.

You should work in the interests of humanity.

For the welfare of humanity.

to labour for the public good

to labour for the public good

work for the general good

Man would perish.

I work for public welfare.

Is mankind still progressing?

to labour in the cause of humanity

to labour in the cause of humanity―serve the cause of humanity

a person who works for the welfare of all human beings

And people must work together for the safety of all humanity.

to labour for the public good―render public service

Mankind will succeed in making peaceful use of atomic energy.

Mankind will succeed in using nuclear energy peacefully.

to labour in the cause of justice

Man is insatiably curious.

the outreach toward truth of the human spirit

to move between people for one's own benefit

Man should make peaceful use of technologies.

to exert oneself for the common weal―exert oneself in the interests of the public

to serve the public―do public service―render service to society

a business that is privately owned and operated

they did much for humanity

Human lives may be at stake.

Man hopes to master nature with science and technology.

Mankind owes immense benefits to Jenner.

to fight in the cause of justice and humanity