small-mindedness
US /ˌsmɔːlˈmaɪn.dɪd.nəs/
UK /ˌsmɔːlˈmaɪn.dɪd.nəs/

1.
the quality of being unwilling to consider new ideas or opinions; narrow-mindedness
:
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His small-mindedness prevented him from understanding different cultures.
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We need to overcome small-mindedness to achieve progress.