source: F18s、access、humbling、in the first place（「サバイバー」シーズン1、第5話） – 技術・実務翻訳の（株）川村翻訳事務所

in the first place

as the first consideration or point:

〖順序〗｟書｠ (最初の論点を導入して)まず第一に［始めに］ (!この意ではfirstlyと交換可能) .

e.g. political reality was not quite that simple—in the first place, divisions existed within the parties.

at the beginning; to begin with (especially in reference to the time when an action was being planned or discussed):

〖非難･いらだち〗｟話｠ (結果に対する話し手の非難･いらだち･強い疑念を示して)そもそも, 元はといえば

e.g. I should have told you in the first place.