birthright

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Jacob had received Esau's birthright by exploiting his hunger (Genesis 25:29-34).
雅各利用以掃的飢餓來奪去他的長子名分（創世記25：29-34）。
Women's tears, arms, but a birthright, the built-in weapons, you said no serious serious?
女人的眼淚，是武器，而且是一種與生俱來，內置的武器，你說厲害不厲害？
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.
是講述一個自出生就被媮走的宇宙公主的故事。她對自己的身世完全沒概唸，被儅成普通女孩在廿四世紀的地球撫養。
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.