Such cooperative behaviors have sometimes been seen as arguments for left-wing politics, for example, by the Russian zoologist and anarchist Peter Kropotkin in his 1902 book Mutual Aid: A Factor of Evolution and Moral Philosopher Peter Singer in his book A Darwinian Left.
sˈʌtʃ koʊˈɑːpɚɹətˌɪv bᵻhˈeɪvjɚz hæv sˈʌmtaɪmz bˌɪn sˈiːn æz ˈɑːɹɡjuːmənts fɔːɹ lˈɛftwˈɪŋ pˈɑːlətˌɪks, fɔːɹ ɛɡzˈæmpəl, baɪ ðə ɹˈʌʃən zuːˈɑːlədʒˌɪst ænd ˈænɑːɹkˌɪst pˈiːɾɚ kɹˈɑːpətkˌɪn ɪn hɪz nˈaɪntiːnhˈʌndɹɪd tˈuː bˈʊk mjˈuːtʃuːəl ˈeɪd: ɐ fˈæktɚɹ ʌv ˌɛvəlˈuːʃən ænd mˈɔːɹəl fɪlˈɑːsəfɚ pˈiːɾɚ sˈɪŋɚɹ ɪn hɪz bˈʊk ɐ dɑːɹwˈɪniən lˈɛft.