ðə sˈeɪfti vˈælv θˈiəɹi wʌzɐ θˈiəɹi ɐbˌaʊt hˌaʊ tə dˈiːl wɪð ʌnɛmplˈɔɪmənt wˌɪtʃ ɡˈeɪv ɹˈaɪz tə ðə hˈoʊmstɛd ˈækt ʌv wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɪksti tˈuː ɪnðə juːnˈaɪɾᵻd stˈeɪts.
The safety valve theory was a theory about how to deal with unemployment which gave rise to the Homestead Act of 1862 in the United States.