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By the 1840s more full-time professional contractors began to make a career of r

1840 · importance 2/5 · ai_extracted

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The Visible Hand whole source · open book
By the 1840s more full-time professional contractors began to make a career of railroad and canal construction

chapter: Innovation in Technology and Organization

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Start date (EDTF) 1840 End date (EDTF, empty for a point event)

1914 · 1914-07-28 · -0489 (490 BCE) · 1930~ (circa) · 19XX (century) · 197X (decade)

Location Importance (1 minor to 5 pivotal)

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colonialism culture detention diplomacy economy environment exploration kenya pillar politics propaganda religion science society technology violence war

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