No, you cannot insure anyone for life insurance.
In order to buy life insurance on someone else, you need their permission, and you must have an Insurable Interest in the person you wish to insure for life insurance.
Insurable Interest basically means you rely on that person for some means of financial support, or that you would suffer some financial loss or cost, upon that person's death.
Usually, you have an Insurable Interest in a spouse, your children, family members, and business partners, possibly.
Learn more about who you may insure for life insurance coverage.