birthright

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Jacob had received Esau's birthright by exploiting his hunger (Genesis 25:29-34).
雅各利用以扫的饥饿来夺去他的长子名分（创世记25：29-34）。
Women's tears, arms, but a birthright, the built-in weapons, you said no serious serious?
女人的眼泪，是武器，而且是一种与生俱来，内置的武器，你说厉害不厉害？
blog.sina.com.cn
"Char" is the story of an intergalactic princess robbed of her birthright. Unaware of her true identity, she is raised as a normal girl on 24th-century Earth.
是讲述一个自出生就被偷走的宇宙公主的故事。她对自己的身世完全没概念，被当成普通女孩在廿四世纪的地球抚养。
trekufp.org

But it is difficult to persuade people brought up to expect cradle-to-grave security as their birthright that times are changing and they should lower their oil-created expectations.
ECONOMIST: Gulf citizen, no qualifications, seeks well-paid job
The United States was built on the promise that freedom and fairness are not endowed only to some -- they are the birthright of all.
WHITEHOUSE: The White House
Rep. Nathan Deal (R-GA) reintroduced his Birthright Citizenship bill that would eliminate automatic citizenship for children born in the United States.
FORBES: Will The Cost Of Immigration Reform Explode The National Deficit?

something that you believe you deserve to have because of your family situation or social class, or because you believe it is your right as a human being

Something that is your birthright is something that you feel you have a basic right to have, simply because you are a human being.